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Applications of surface enhanced Raman scattering (SERS) spectroscopy for detection of nucleic acids Nanophotonics (IF 6.5) Pub Date : 2024-09-14 Aleksandra Michałowska, Andrzej Kudelski
Nucleic acids (deoxyribonucleic acid – DNA and ribonucleic acid – RNA) are essential components of all living organisms, with DNA encoding genetic information and RNA facilitating vital biological processes. The detection of nucleic acids having a specific sequence is crucial for identifying organisms and diagnosing genetic diseases. Because surface-enhanced Raman spectroscopy (SERS) is considered
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Effect of magnesium doping on NiO hole injection layer in quantum dot light-emitting diodes Nanophotonics (IF 6.5) Pub Date : 2024-09-10 Nayoon Lee, Van Khoe Vo, Hyo-Jun Lim, Sunwoo Jin, Thi Huong Thao Dang, Heewon Jang, Dayoung Choi, Joon-Hyung Lee, Byoung-Seong Jeong, Young-Woo Heo
This study reports on the fabrication of quantum dot light-emitting diodes (QLEDs) with an ITO/Ni1−x Mg x O/SAM/TFB/QDs/ZnMgO/Al structure and investigates the effects of various Mg doping concentrations in NiO on device performance. By doping Mg into the inorganic hole-injection layer NiO (Ni1−x Mg x O), we improved the band alignment with the hole-injection layer through band tuning, which enhanced
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On chip control and detection of complex SPP and waveguide modes based on plasmonic interconnect circuits Nanophotonics (IF 6.5) Pub Date : 2024-09-09 Canran Zhang, Yijing Xu, Hui Tao, Pan Wang, Yunkang Cui, Qilong Wang
Optical interconnects, leveraging surface plasmon modes, are revolutionizing high-performance computing and AI, overcoming the limitations of electrical interconnects in speed, energy efficiency, and miniaturization. These nanoscale photonic circuits integrate on-chip light manipulation and signal conversion, marking significant advancements in optoelectronics and data processing efficiency. Here,
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Anomalous reflection for highly efficient subwavelength light concentration and extraction with photonic funnels Nanophotonics (IF 6.5) Pub Date : 2024-09-09 Jacob LaMountain, Amogh Raju, Daniel Wasserman, Viktor A. Podolskiy
Photonic funnels, microscale conical waveguides that have been recently realized in the mid-IR spectral range with the help of an all-semiconductor designer metal material platform, are promising devices for efficient coupling of light between the nanoscales and macroscales. Previous analyses of photonic funnels have focused on structures with highly conductive claddings. Here, we analyze the performance
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Inverse-designed taper configuration for the enhancement of integrated 1 × 4 silicon photonic power splitters Nanophotonics (IF 6.5) Pub Date : 2024-09-09 Seokjin Hong, Jinhyeong Yoon, Junhyeong Kim, Berkay Neseli, Jae-Yong Kim, Hyo-Hoon Park, Hamza Kurt
Once light is coupled to a photonic chip, its efficient distribution in terms of power splitting throughout silicon photonic circuits is very crucial. We present two types of 1 × 4 power splitters with different splitting ratios of 1:1:1:1 and 2:1:1:2. Various taper configurations were compared and analyzed to find the suitable configuration for the power splitter, and among them, parabolic tapers
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Asymmetric bi-level dual-core mode converter for high-efficiency and polarization-insensitive O-band fiber-chip edge coupling: breaking the critical size limitation Nanophotonics (IF 6.5) Pub Date : 2024-09-07 Xiaolin Yi, Dongyue Sun, Weike Zhao, Hanwen Li, Long Zhang, Yaocheng Shi, Daoxin Dai
Efficient coupling between optical fibers and on-chip photonic waveguides has long been a crucial issue for photonic chips used in various applications. Edge couplers (ECs) based on an inverse taper have seen widespread utilization due to their intrinsic broadband operation. However, it still remains a big challenge to realize polarization-insensitive low-loss ECs working at the O-band (1,260–1,360
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High-efficiency and broadband asymmetric spin–orbit interaction based on high-order composite phase modulation Nanophotonics (IF 6.5) Pub Date : 2024-09-05 Yuzhong Ou, Yan Chen, Fei Zhang, Mingbo Pu, Mengna Jiang, Mingfeng Xu, Yinghui Guo, Chaolong Feng, Ping Gao, Xiangang Luo
Asymmetric spin–orbit interaction (ASOI) breaks the limitations in conjugate symmetry of traditional geometric phase metasurfaces, bringing new opportunities for various applications such as spin-decoupled holography, imaging, and complex light field manipulation. Since anisotropy is a requirement for spin–orbit interactions, existing ASOI mainly relies on meta-atom with C1 and C2 symmetries, which
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Neural network-assisted meta-router for fiber mode and polarization demultiplexing Nanophotonics (IF 6.5) Pub Date : 2024-09-05 Yu Zhao, Huijiao Wang, Tian Huang, Zhiqiang Guan, Zile Li, Lei Yu, Shaohua Yu, Guoxing Zheng
Advancements in computer science have propelled society into an era of data explosion, marked by a critical need for enhanced data transmission capacity, particularly in the realm of space-division multiplexing and demultiplexing devices for fiber communications. However, recently developed mode demultiplexers primarily focus on mode divisions within one dimension rather than multiple dimensions (i
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Highly uniform silicon nanopatterning with deep-ultraviolet femtosecond pulses Nanophotonics (IF 6.5) Pub Date : 2024-09-04 Eduardo Granados, Miguel Martinez-Calderon, Baptiste Groussin, Jean Philippe Colombier, Ibon Santiago
The prospect of employing nanophotonic methods for controlling photon–electron interactions has ignited substantial interest within the particle accelerator community. Silicon-based integrated dielectric laser acceleration (DLA) has emerged as a viable option by leveraging localized photonic effects to emit, accelerate, and measure electron bunches using exclusively light. Here, using highly regular
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Optical Zitterbewegung effect in arrays of helical waveguides Nanophotonics (IF 6.5) Pub Date : 2024-09-04 Kaiyun Zhan, Qixuan Chen, Qian Zhang, Tingjun Zhao, Hanqiang Qin, Haolong He, Guangting Yao
Owing to its topological properties and band collapse, Floquet helical photonic lattices have gained increasing attention as a purely classical setting to realize the optical analogues of a wide variety of quantum phenomena. We demonstrate both theoretically and numerically that light propagation in an appropriately designed helical superlattice can exhibit spatial photonic Zitterbewegung effect, i
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Low-loss and compact arbitrary-order silicon mode converter based on hybrid shape optimization Nanophotonics (IF 6.5) Pub Date : 2024-08-29 Junpeng Liao, Dongmei Huang, Yegang Lu, Yan Li, Ye Tian
Mode converters (MCs) play an essential role in mode-division multiplexing (MDM) systems. Numerous schemes have been developed on the silicon-on-insulator (SOI) platform, yet most of them focus solely on the conversion of fundamental mode to one or two specific higher-order modes. In this study, we introduce a hybrid shape optimization (HSO) method that combines particle swarm optimization (PSO) with
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Millimeter-precision positioning for wide-angle indoor area enabled by metalens-integrated camera Nanophotonics (IF 6.5) Pub Date : 2024-08-28 Muyang Li, Yue Wu, Haobai Li, Zi-Wen Zhou, Yanxiang Zhang, Zhongyi Yuan, Zaichen Zhang, Ji Chen
Due to signal shielding caused by building structures, conventional mature positioning technologies such as the Global Positioning System (GPS) are only suitable for outdoor navigation and detection. However, there are many scenarios that urgently require high-precision indoor positioning technologies, such as indoor wireless optical communications (OWCs), navigation in large buildings, and warehouse
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Snapshot computational spectroscopy enabled by deep learning Nanophotonics (IF 6.5) Pub Date : 2024-08-28 Haomin Zhang, Quan Li, Huijuan Zhao, Bowen Wang, Jiaxing Gong, Li Gao
Spectroscopy is a technique that analyzes the interaction between matter and light as a function of wavelength. It is the most convenient method for obtaining qualitative and quantitative information about an unknown sample with reasonable accuracy. However, traditional spectroscopy is reliant on bulky and expensive spectrometers, while emerging applications of portable, low-cost and lightweight sensing
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Design of optical Kerr effect in multilayer hyperbolic metamaterials Nanophotonics (IF 6.5) Pub Date : 2024-08-28 Domenico Genchi, Francesca Dodici, Tiziana Cesca, Giovanni Mattei
The design of optical materials in nonlinear devices represents a fundamental step for their optimization and miniaturization, that would significantly contribute to the progress of advanced nanophotonics and quantum technologies. In this work, the effect of geometry and composition of multilayer hyperbolic metamaterials on their third-order nonlinear optical properties, i.e. the optical Kerr effect
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Multichannel full-space coding metasurface with linearly-circularly-polarized wavefront manipulation Nanophotonics (IF 6.5) Pub Date : 2024-08-28 Huiling Luo, Huanhuan Gao, Yanzhao Wang, Chaohui Wang, Fan Zhang, Yanzhang Shao, Tong Liu, Zhengjie Wang, He-Xiu Xu
Achieving independent multitasked wavefront control by using an ultrathin plate is a challenge to increase information capacity in integration optics and radar applications. Transmission-reflection-integrated metasurface provides an efficient recipe primarily for multifunctional meta-device, however it is challenging to synergize both linear polarization (LP) and circular polarization (CP) using a
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Artificial optoelectronic synapse based on CdSe nanobelt photosensitized MoS2 transistor with long retention time for neuromorphic application Nanophotonics (IF 6.5) Pub Date : 2024-08-28 Xiaohui Song, Xiaojing Lv, Mengjie He, Fei Mao, Jie Bai, Xuan Qin, Yanjie Hu, Zinan Ma, Zhen Liu, Xueping Li, Chenhai Shen, Yurong Jiang, Xu Zhao, Congxin Xia
Optoelectronic synaptic devices have been regarded as the key component in constructing neuromorphic computing systems. However, the optoelectronic synapses based on conventional 2D transistor are still suffering low photosensitivity and volatile retention behavior, which can affect the recognition accuracy and long-term memory. Here, a novel optoelectronic synaptic device based on surface-state-rich
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Hybrid plasmonic nanodiamonds for thermometry and local photothermal therapy of melanoma: a comparative study Nanophotonics (IF 6.5) Pub Date : 2024-08-28 Elena N. Gerasimova, Landysh I. Fatkhutdinova, Ivan I. Vazhenin, Egor I. Uvarov, Elizaveta Vysotina, Lidia Mikhailova, Polina A. Lazareva, Dmitry Kostyushev, Maxim Abakumov, Alessandro Parodi, Vitaly V. Yaroshenko, Dmitry A. Zuev, Mikhail V. Zyuzin
Hyperthermia plays a significant role in cancer treatment by inducing cell damage through temperature elevation, often used alongside other treatment modalities. During hyperthermia therapy, temperature control is crucial. Here, we report on a simple synthesis route of hybrid plasmonic nanodiamonds either completely wrapped with an Au shell (NV@Au) or densely covered with Au NPs (NV@SiO 2 @Au). Such
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Molecular surface coverage standards by reference-free GIXRF supporting SERS and SEIRA substrate benchmarking Nanophotonics (IF 6.5) Pub Date : 2024-08-28 Eleonora Cara, Philipp Hönicke, Yves Kayser, Burkhard Beckhoff, Andrea M. Giovannozzi, Petr Klapetek, Alberto Zoccante, Maurizio Cossi, Li-Lin Tay, Luca Boarino, Federico Ferrarese Lupi
Non-destructive reference-free grazing incidence X-ray fluorescence (RF-GIXRF) is proposed as a highly effective analytical technique for extracting molecular arrangement density in self-assembled monolayers. The establishment of surface density standards through RF-GIXRF impacts various applications, from calibrating laboratory XRF setups to expanding its applicability in materials science, particularly
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Surface plasmon polariton–enhanced upconversion luminescence for biosensing applications Nanophotonics (IF 6.5) Pub Date : 2024-08-27 Duc Le, Marjut Kreivi, Sanna Aikio, Noora Heinilehto, Teemu Sipola, Jarno Petäjä, Tian-Long Guo, Matthieu Roussey, Jussi Hiltunen
Upconversion luminescence (UCL) has great potential for highly sensitive biosensing due to its unique wavelength shift properties. The main limitation of UCL is its low quantum efficiency, which is typically compensated using low-noise detectors and high-intensity excitation. In this work, we demonstrate surface plasmon polariton (SPP)-enhanced UCL for biosensing applications. SPPs are excited by using
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Ultrathin Ge-YF3 antireflective coating with 0.5 % reflectivity on high-index substrate for long-wavelength infrared cameras Nanophotonics (IF 6.5) Pub Date : 2024-08-27 Jae-Seon Yu, Serang Jung, Jin-Woo Cho, Geon-Tae Park, Mikhail Kats, Sun-Kyung Kim, Eungkyu Lee
Achieving long-wavelength infrared (LWIR) cameras with high sensitivity and shorter exposure times faces challenges due to series reflections from high-refractive index lenses within compact optical systems. However, designing effective antireflective coatings to maximize light throughput in these systems is complicated by the limited range of transparent materials available for the LWIR. This scarcity
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A tiny Drude scatterer can accurately model a coherent emitter in nanophotonics Nanophotonics (IF 6.5) Pub Date : 2024-08-27 Felix Binkowski, Sven Burger, Günter Kewes
We add a missing element to the set of directly computable scenarios of light-matter-interaction within classical numerical Maxwell solvers, i.e., light scattering from hybrid systems of resonators and individual Fourier-limited emitters. In particular, individual emitters are incorporated as tiny polarizable and resonant spherical scatterers. This emitter model is based on well-known extremal properties
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Strongly coupled plasmon-exciton polaritons for photobleaching suppression Nanophotonics (IF 6.5) Pub Date : 2024-08-27 Justina Anulytė, Vytautas Žičkus, Ernesta Bužavaitė-Vertelienė, Daniele Faccio, Zigmas Balevičius
Strong light–matter interactions have received a lot of attention, for example in the pursuit of plasmonic-excitonic structures as coherent light sources with low-power threshold. In this study, we investigate the influence of room temperature strong coupling between surface plasmon polaritons (SPP) and excitons on fluorescence lifetimes and photobleaching effects. Our plasmonic-photonic structure
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Dual-control of incubation effect for efficiently fabricating surface structures in fused silica Nanophotonics (IF 6.5) Pub Date : 2024-08-27 Zhi Wang, Zhikun Xiang, Xiaowei Li, Mengnan Wu, Peng Yi, Chao Zhang, Yihao Yan, Xibiao Li, Xiangyu Zhang, Andong Wang, Lingling Huang
Fused silica with surface structures has potential applications in microfluidic, aerospace and other fields. To fabricate structures with high dimensional accuracy and surface quality is of paramount importance. However, it is indeed a challenge to strike a balance between accuracy and efficiency at the same time. Here, a temporally shaped femtosecond laser Bessel-beam-assisted etching method with
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Wafer-scale nanofabrication of sub-5 nm gaps in plasmonic metasurfaces Nanophotonics (IF 6.5) Pub Date : 2024-08-27 Jeetendra Gour, Sebastian Beer, Pallabi Paul, Alessandro Alberucci, Michael Steinert, Adriana Szeghalmi, Thomas Siefke, Ulf Peschel, Stefan Nolte, Uwe Detlef Zeitner
In the rapidly evolving field of plasmonic metasurfaces, achieving homogeneous, reliable, and reproducible fabrication of sub-5 nm dielectric nanogaps is a significant challenge. This article presents an advanced fabrication technology that addresses this issue, capable of realizing uniform and reliable vertical nanogap metasurfaces on a whole wafer of 100 mm diameter. By leveraging fast patterning
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Clearing a path for light through non-Hermitian media Nanophotonics (IF 6.5) Pub Date : 2024-08-06 Utsav D. Dave, Gaurang R. Bhatt, Janderson R. Rodrigues, Ipshita Datta, Michal Lipson
The performance of all active photonic devices today is greatly limited by loss. Here, we show that one can engineer a low loss path in a metal-clad lossy multi-mode waveguide while simultaneously achieving high-performance active photonic devices. We leverage non-Hermitian systems operating beyond the exceptional point to enable the redistribution of losses in a multi-mode photonic waveguide. Consequently
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Broadband mode exchanger based on subwavelength Y-junctions Nanophotonics (IF 6.5) Pub Date : 2024-08-06 Raquel Fernández de Cabo, Alejandro Sánchez-Sánchez, Yijun Yang, Daniele Melati, Carlos Alonso-Ramos, Aitor V. Velasco, David González-Andrade
Multimode silicon photonics, leveraging mode-division multiplexing technologies, offers significant potential to increase capacity of large-scale multiprocessing systems for on-chip optical interconnects. These technologies have implications not only for telecom and datacom applications, but also for cutting-edge fields such as quantum and nonlinear photonics. Thus, the development of compact, low-loss
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Two-dimensional flat-band solitons in superhoneycomb lattices Nanophotonics (IF 6.5) Pub Date : 2024-08-06 Shuang Shen, Yiqi Zhang, Yaroslav V. Kartashov, Yongdong Li, Vladimir V. Konotop
Flat-band periodic materials are characterized by a linear spectrum containing at least one band where the propagation constant remains nearly constant irrespective of the Bloch momentum across the Brillouin zone. These materials provide a unique platform for investigating phenomena related to light localization. Meantime, the interaction between flat-band physics and nonlinearity in continuous systems
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Symmetry-protected bound states in the continuum on an integrated photonic platform Nanophotonics (IF 6.5) Pub Date : 2024-08-02 Qijing Lu, Ziyao Feng, Xiankai Sun
Bound states in the continuum (BICs) have attracted much attention in the field of nanophotonics owing to their ability to trap photons without loss. Recently, a low-refractive-index (RI) waveguide loaded on a high-RI slab structure was demonstrated to support BICs. However, strict control of structural parameters is required due to the accidental nature of those BICs. Here, we propose a novel structure
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Integrating deep convolutional surrogate solvers and particle swarm optimization for efficient inverse design of plasmonic patch nanoantennas Nanophotonics (IF 6.5) Pub Date : 2024-08-02 Saeed Hemayat, Sina Moayed Baharlou, Alexander Sergienko, Abdoulaye Ndao
Plasmonic nanoantennas with suitable far-field characteristics are of huge interest for utilization in optical wireless links, inter-/intrachip communications, LiDARs, and photonic integrated circuits due to their exceptional modal confinement. Despite its success in shaping robust antenna design theories in radio frequency and millimeter-wave regimes, conventional transmission line theory finds its
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Fast and low energy-consumption integrated Fourier-transform spectrometer based on thin-film lithium niobate Nanophotonics (IF 6.5) Pub Date : 2024-08-02 Xijie Wang, Ziliang Ruan, Kaixuan Chen, Gengxin Chen, Mai Wang, Bin Chen, Liu Liu
Integrated miniature spectrometers have impacts in industry, agriculture, and aerospace applications due to their unique advantages in portability and energy consumption. Although existing on-chip spectrometers have achieved breakthroughs in key performance metrics, such as, a high resolution and a large bandwidth, their scanning speed and energy consumption still hinder practical applications of such
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Flat band fine-tuning and its photonic applications Nanophotonics (IF 6.5) Pub Date : 2024-08-02 Carlo Danieli, Alexei Andreanov, Daniel Leykam, Sergej Flach
Flat bands – single-particle energy bands – in tight-binding lattices, aka networks, have attracted attention due to the presence of macroscopic degeneracies and their sensitivity to perturbations. They support compact localized eigenstates protected by destructive interference. This makes them natural candidates for emerging exotic phases and unconventional orders. In this review we consider the recently
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Enhanced vertical second harmonic generation from layered GaSe coupled to photonic crystal circular Bragg resonators Nanophotonics (IF 6.5) Pub Date : 2024-08-02 Zhuojun Liu, Bo Chen, Xuying Wang, Guixin Qiu, Qitao Cao, Dunzhao Wei, Jin Liu
Two-dimensional (2D) layered materials without centrosymmetry, such as GaSe, have emerged as promising novel optical materials due to large second-order nonlinear susceptibilities. However, their nonlinear responses are severely limited by the short interaction between the 2D materials and light, which should be improved by coupling them with photonic structures with strong field confinement. Here
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Substrate-induced hybridization of plasmon modes in the composite nanostructure of nanodisk array/thin film for spectrum modulation Nanophotonics (IF 6.5) Pub Date : 2024-08-01 Yuzhang Liang, Shuwen Chu, Xinran Wei, Haonan Wei, Sun Cheng, Yi Han, Wei Peng
Hybridization coupling among plasmon modes is an effective approach to manipulate near-field properties thus optical spectral shapes of plasmonic nanostructures. Generally, mode hybridization coupling is achieved by modifying the topography and dimensions of nanostructures themselves, with few concerns about substrate-induced manipulation. Herein, we propose a composite nanostructure consisting of
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Second harmonic generation and broad-band photoluminescence in mesoporous Si/SiO2 nanoparticles Nanophotonics (IF 6.5) Pub Date : 2024-07-31 Viktoriia Mastalieva, Vladimir Neplokh, Arseniy Aybush, Ekaterina Stovpiaga, Daniil Eurov, Maksim Vinnichenko, Danila Karaulov, Demid Kirillenko, Alexey Mozharov, Vladislav Sharov, Denis Kolchanov, Andrey Machnev, Valery Golubev, Alexander Smirnov, Pavel Ginzburg, Sergey Makarov, Dmitry Kurdyukov, Ivan Mukhin
Efficient second harmonic generation and broad-band photoluminescence from deeply subwavelength and nontoxic nanoparticles is essential for nanophotonic applications. Here, we explore nonlinear optical response from mesoporous Si/SiO2, SiO2, and Si nanoparticles, considering various fabrication and treatment procedures. We show that thermal annealing (including femtosecond laser treatment) of mesoporous
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Efficient generation of octave-separating orbital angular momentum beams via forked grating array in lithium niobite crystal Nanophotonics (IF 6.5) Pub Date : 2024-07-31 Xinyu Liu, Dan Wei, Chun Chang, Dingwei Liu, Juntao Li, Dunzhao Wei
The concept of orbital angular momentum (OAM) of light has not only advanced fundamental physics research but also yielded a plethora of practical applications, benefitting from the abundant methods for OAM generation based on linear, nonlinear and combined schemes. The combined scheme could generate octave-separating OAM beams, potentially increasing the channels for optical communication and data
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Four-channel graphene optical receiver Nanophotonics (IF 6.5) Pub Date : 2024-07-31 Laiwen Yu, Yurui Li, Hengtai Xiang, Yuanrong Li, Hengzhen Cao, Zhongyang Ji, Liu Liu, Xi Xiao, Jianbo Yin, Jingshu Guo, Daoxin Dai
Silicon photonics with the advantages of low power consumption and low fabrication cost is a crucial technology for facilitating high-capacity optical communications and interconnects. The graphene photodetectors (GPDs) featuring broadband operation, high speed, and low integration cost can be good additions to the SiGe photodetectors, supporting high-speed photodetection in wavelength bands beyond
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Asymmetric dumbbell dimers simultaneously supporting quasi-bound states in continuum and anapole modes for terahertz biosensing Nanophotonics (IF 6.5) Pub Date : 2024-07-31 Jixin Feng, Xianghui Wang, Weinan Shi, Liang Ma, Yunyun Ji, Fei Fan, Shengjiang Chang
Multi-resonant metasurfaces are of great significance in the applications of multi-band nanophotonics. Here, we propose a novel metasurface design scheme for simultaneously supporting quasi-bound states in continuum (QBIC) and other resonant modes, in which QBIC resonance is generated by mirror or rotational symmetry breaking in oligomers while other resonant modes can be simultaneously excited by
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Tailoring of the polarization-resolved second harmonic generation in two-dimensional semiconductors Nanophotonics (IF 6.5) Pub Date : 2024-07-30 Sotiris Psilodimitrakopoulos, Stepan Ilin, Lev E. Zelenkov, Sergey Makarov, Emmanuel Stratakis
Second harmonic generation is a non-linear optical phenomenon in which coherent radiation with frequency ω interacts with a non-centrosymmetric material and produces coherent radiation at frequency 2ω. Owing to the exciting physical phenomena that take place during the non-linear optical excitation at the nanoscale, there is currently extensive research in the non-linear optical responses of nanomaterials
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DeepQR: single-molecule QR codes for optical gene-expression analysis Nanophotonics (IF 6.5) Pub Date : 2024-07-29 Jonathan Jeffet, Barak Hadad, Sahar Froim, Kawsar Kaboub, Keren M. Rabinowitz, Jasline Deek, Sapir Margalit, Iris Dotan, Alon Bahabad, Yuval Ebenstein
Optical imaging and single-molecule imaging, in particular, utilize fluorescent tags in order to differentiate observed species by color. The degree of color multiplexing is dependent on the available spectral detection window and the ability to distinguish between fluorophores of different colors within this window. Consequently, most single-molecule imaging techniques rely on two to four colors for
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Nonreciprocal scattering and unidirectional cloaking in nonlinear nanoantennas Nanophotonics (IF 6.5) Pub Date : 2024-07-26 Heedong Goh, Alex Krasnok, Andrea Alù
Reciprocal scatterers necessarily extinguish the same amount of incoming power when excited from opposite directions. This property implies that it is not possible to realize scatterers that are transparent when excited from one direction but that scatter and absorb light for the opposite excitation, limiting opportunities in the context of asymmetric imaging and nanophotonic circuits. This reciprocity
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Dual-band complex-amplitude metasurface empowered high security cryptography with ultra-massive encodable patterns Nanophotonics (IF 6.5) Pub Date : 2024-07-23 Zhen Gu, Rensheng Xie, Haoyang Liu, Yiting Liu, Xiong Wang, Hualiang Zhang, Jianjun Gao, Liming Si, Shuqi Chen, Jun Ding
The significance of a cryptograph method lies in its ability to provide high fidelity, high security, and large capacity. The emergence of metasurface-empowered cryptography offers a promising alternative due to its unparalleled wavefront modulation capabilities and easy integration with traditional schemes. However, the majority of reported strategies suffer from limited capacity as a result of restricted
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Nonlinear mid-infrared meta-membranes Nanophotonics (IF 6.5) Pub Date : 2024-07-23 Giovanni Sartorello, Joshua Bocanegra, David Knez, Daniil M. Lukin, Joshua Yang, Jelena Vučković, Dmitry A. Fishman, Gennady Shvets, Maxim R. Shcherbakov
Nanophotonic structures have shown promising routes to controlling and enhancing nonlinear optical processes at the nanoscale. However, most nonlinear nanostructures require a handling substrate, reducing their application scope. Due to the underwhelming heat dissipation, it has been a challenge to evaluate the nonlinear optical properties of free-standing nanostructures. Here, we overcome this challenge
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Phase-matched five-wave mixing in zinc oxide microwire Nanophotonics (IF 6.5) Pub Date : 2024-07-23 Kaibo Cui, Tianzhu Zhang, Tao Rao, Xianghui Zhang, Shunping Zhang, Hongxing Xu
High-order wave mixing in solid-state platforms gather increasing importance due to the development of advanced lasers and integrated photonic circuit for both classical and quantum information. However, the high-order wave mixing is generally inefficient in solids under weak pump. Here, we observed the presence of phase matching of five-wave mixing (5WM) propagating in a zinc oxide (ZnO) microwire
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CMOS-compatible, AlScN-based integrated electro-optic phase shifter Nanophotonics (IF 6.5) Pub Date : 2024-07-23 Valerie Yoshioka, Jicheng Jin, Haiqi Zhou, Zichen Tang, Roy H. Olsson III, Bo Zhen
Commercial production of integrated photonic devices is limited by scalability of desirable material platforms. We explore a relatively new photonic material, AlScN, for its use in electro-optic phase shifting and modulation. Its CMOS-compatibility could facilitate large-scale production of integrated photonic modulators, and it exhibits an enhanced second-order optical nonlinearity compared to intrinsic
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Highly sensitive volumetric single-molecule imaging Nanophotonics (IF 6.5) Pub Date : 2024-07-12 Le-Mei Wang, Jiah Kim, Kyu Young Han
Volumetric subcellular imaging has long been essential for studying structures and dynamics in cells and tissues. However, due to limited imaging speed and depth of field, it has been challenging to perform live-cell imaging and single-particle tracking. Here we report a 2.5D fluorescence microscopy combined with highly inclined illumination beams, which significantly reduce not only the image acquisition
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A review of gallium phosphide nanophotonics towards omnipotent nonlinear devices Nanophotonics (IF 6.5) Pub Date : 2024-07-11 Yifan Wang, Ziyu Pan, Yongxian Yan, Yatao Yang, Wenhua Zhao, Ning Ding, Xingyu Tang, Pengzhuo Wu, Qiancheng Zhao, Yi Li
Gallium phosphide (GaP) has been increasingly prioritized, fueled by the enormous demands in visible light applications such as biomedical and quantum technologies. GaP has garnered tremendous attention in nanophotonics thanks to its high refractive index, indirect bandgap width of 2.26 eV, lattice perfectly matched with silicon, and omnipotent and competitive nonlinear optical properties. Herein,
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Free electrons spin-dependent Kapitza–Dirac effect in two-dimensional triangular optical lattice Nanophotonics (IF 6.5) Pub Date : 2024-07-11 Jiahao Tian, Fang Liu, Xiaotong Xiong, Yidong Huang
The free electron spin dynamics in Kapitza–Dirac (KD) effect had been studied theoretically in one-dimensional standing wave of EUV to X-ray laser with extremely high intensity, which is far beyond experimental realization. Here, we propose to achieve the free electron spin-dependent KD effect in two-dimensional triangular optical lattice with spatial inversion symmetry breaking, and the theoretical
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Second harmonic generation in monolithic gallium phosphide metasurfaces Nanophotonics (IF 6.5) Pub Date : 2024-07-11 Muyi Yang, Maximilian A. Weissflog, Zlata Fedorova, Angela I. Barreda, Stefan Börner, Falk Eilenberger, Thomas Pertsch, Isabelle Staude
Gallium phosphide (GaP) offers unique opportunities for nonlinear and quantum nanophotonics due to its wide optical transparency range, high second-order nonlinear susceptibility, and the possibility to tailor the nonlinear response by a suitable choice of crystal orientation. However, the availability of single crystalline thin films of GaP on low index substrates, as typically required for nonlinear
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Giant second-harmonic generation in monolayer MoS2 boosted by dual bound states in the continuum Nanophotonics (IF 6.5) Pub Date : 2024-07-11 Ji Tong Wang, Jian Wei You, Nicolae C. Panoiu
Dielectric metasurfaces open new avenues in nonlinear optics through their remarkable capability of boosting frequency conversion efficiency of nonlinear optical interactions. Here, a metasurface consisting of a square array of cruciform-shaped silicon building blocks covered by a monolayer MoS2 is proposed. By designing the metasurface so that it supports optical bound states in the continuum (BICs)
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Flat lens–based subwavelength focusing and scanning enabled by Fourier translation Nanophotonics (IF 6.5) Pub Date : 2024-07-10 Xin Zhang, Yanwen Hu, Haolin Lin, Hao Yin, Zhen Li, Shenhe Fu, Zhenqiang Chen
We demonstrate a technique for flexibly controlling subwavelength focusing and scanning, by using the Fourier translation property of a topology-preserved flat lens. The Fourier transform property of the flat lens enables converting an initial phase shift of light into a spatial displacement of its focus. The flat lens used in the technique exhibits a numerical aperture of 0.7, leading to focusing
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Long-range molecular energy transfer mediated by strong coupling to plasmonic topological edge states Nanophotonics (IF 6.5) Pub Date : 2024-07-10 Álvaro Buendía, José A. Sánchez-Gil, Vincenzo Giannini, William L. Barnes, Marie S. Rider
Strong coupling between light and molecular matter is currently attracting interest both in chemistry and physics, in the fast-growing field of molecular polaritonics. The large near-field enhancement of the electric field of plasmonic surfaces and their high tunability make arrays of metallic nanoparticles an interesting platform to achieve and control strong coupling. Two dimensional plasmonic arrays
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Experimental observation of spin Hall effect of light using compact weak measurements Nanophotonics (IF 6.5) Pub Date : 2024-07-10 Jeonghoon Choi, Sangmin Shim, Yeseul Kim, Peng Tang, Guoqiang Li, Junsuk Rho, Dasol Lee, Minkyung Kim
The spin Hall effect of light, a phenomenon characterized by the transverse and spin dependent splitting of light at an optical interface, is highly promising for collecting precise quantitative data from interfaces and stands as an appealing option for improving precision metrology. This high level of precision is attributed to the principles of weak measurement. Since its conceptual introduction
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Simultaneous thermal camouflage and radiative cooling for ultrahigh-temperature objects using inversely designed hierarchical metamaterial Nanophotonics (IF 6.5) Pub Date : 2024-07-10 Saichao Dang, Wei Yang, Jialei Zhang, Qiwen Zhan, Hong Ye
Sophisticated infrared detection technology, operating through atmospheric transmission windows (usually between 3 and 5 μm and 8–13 μm), can detect an object by capturing its emitted thermal radiation, posing a threat to the survival of targeted objects. As per Wien’s displacement law, the shift of peak wavelength towards shorter wavelengths as blackbody temperature rises, underscores the significance
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Ultra-sensitive, graphene metasurface sensor integrated with the nonradiative anapole mode for detecting and differentiating two preservatives Nanophotonics (IF 6.5) Pub Date : 2024-07-10 Gui Fang Wu, Feng Ping Yan, Xin Yan, Wei Wang, Ting Li, Zhen Hua Li, Lan Ju Liang, Rui Zhang, Fu Tong Chu, Hai Yun Yao, Meng Wang, Zi Qun Wang, Lu Wang, Xiao Fei Hu
Graphene-based metamaterial sensors are of significant research value for detecting food preservatives at low concentrations due to their extremely high sensitivity levels. In this work, we proposed and experimentally demonstrated an anapole resonance-based graphene metasurface (An-graphene-Ms) sensor with its conductivity altered by electrostatic doping effects for detecting and differentiating between
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Photonic Dirac waveguide in inhomogeneous spoof surface plasmonic metasurfaces Nanophotonics (IF 6.5) Pub Date : 2024-07-10 Yuting Yang, Juyi Zhang, Bin Yang, Shiyu Liu, Wenjie Zhang, Xiaopeng Shen, Liwei Shi, Zhi Hong Hang
The metamaterial with artificial synthetic gauge field has been proved as an excellent platform to manipulate the transport of the electromagnetic wave. Here we propose an inhomogeneous spoof surface plasmonic metasurface to construct an in-plane pseudo-magnetic field, which is generated by engineering the gradient variation of the opened Dirac cone corresponding to spatially varying mass term. The
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Demultiplexing-free ultra-compact WDM-compatible multimode optical switch assisted by mode exchanger Nanophotonics (IF 6.5) Pub Date : 2024-07-03 Siwei Liu, Xin Fu, Jiaqi Niu, Yujie Huo, Chuang Cheng, Lin Yang
Silicon-based optical switches are integral to on-chip optical interconnects, and mode-division multiplexing (MDM) technology has enabled modes to function as carriers in routing, further boosting optical switches’ link capacity. However, traditional multimode optical switches, which typically use Mach–Zehnder interferometer (MZI) structures and mode (de)multiplexers, are complex and occupy significant
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Opto-intelligence spectrometer using diffractive neural networks Nanophotonics (IF 6.5) Pub Date : 2024-07-02 Ze Wang, Hang Chen, Jianan Li, Tingfa Xu, Zejia Zhao, Zhengyang Duan, Sheng Gao, Xing Lin
Spectral reconstruction, critical for understanding sample composition, is extensively applied in fields like remote sensing, geology, and medical imaging. However, existing spectral reconstruction methods require bulky equipment or complex electronic reconstruction algorithms, which limit the system’s performance and applications. This paper presents a novel flexible all-optical opto-intelligence
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Dynamic control of the directional scattering of single Mie particle by laser induced metal insulator transitions Nanophotonics (IF 6.5) Pub Date : 2024-07-01 Yanlin Zhu, Shulei Li, Yang Zhang, Jinjing Meng, Xu Tan, Jingdong Chen, Mingcheng Panmai, Jin Xiang
Interference between the electric and magnetic dipole-induced in Mie nanostructures has been widely demonstrated to tailor the scattering field, which was commonly used in optical nano-antennas, filters, and routers. The dynamic control of scattering fields based on dielectric nanostructures is interesting for fundamental research and important for practical applications. Here, it is shown theoretically
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Nonlinear optical physics at terahertz frequency Nanophotonics (IF 6.5) Pub Date : 2024-07-01 Yao Lu, Yibo Huang, Junkai Cheng, Ruobin Ma, Xitan Xu, Yijia Zang, Qiang Wu, Jingjun Xu
Terahertz (THz) waves have exhibited promising prospects in 6G/7G communications, sensing, nondestructive detection, material modulation, and biomedical applications. With the development of high-power THz sources, more and more nonlinear optical effects at THz frequency and THz-induced nonlinear optical phenomena are investigated. These studies not only show a clear physics picture of electrons, ions
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Inverse design of color routers in CMOS image sensors: toward minimizing interpixel crosstalk Nanophotonics (IF 6.5) Pub Date : 2024-07-01 Sangbin Lee, Jaehyun Hong, Joonho Kang, Junjeong Park, Jaesung Lim, Taeho Lee, Min Seok Jang, Haejun Chung
Over the past decade, significant advancements in high-resolution imaging technology have been driven by the miniaturization of pixels within image sensors. However, this reduction in pixel size to submicrometer dimensions has led to decreased efficiency in color filters and microlens arrays. The development of color routers that operate at visible wavelengths presents a promising avenue for further