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  • Purcell-enhanced emission from individual SiV− center in nanodiamonds coupled to a Si3N4-based, photonic crystal cavity
    Nanophotonics (IF 7.491) Pub Date : 2020-07-10
    Konstantin G. Fehler; Anna P. Ovvyan; Lukas Antoniuk; Niklas Lettner; Nico Gruhler; Valery A. Davydov; Viatcheslav N. Agafonov; Wolfram H.P. Pernice; Alexander Kubanek

    Hybrid quantum photonics combines classical photonics with quantum emitters in a postprocessing step. It facilitates to link ideal quantum light sources to optimized photonic platforms. Optical cavities enable to harness the Purcell-effect boosting the device efficiency. Here, we postprocess a free-standing, crossed-waveguide photonic crystal cavity based on Si3N4 with SiV− center in nanodiamonds.

    更新日期:2020-07-10
  • Magnetic switching of Kerker scattering in spherical microresonators
    Nanophotonics (IF 7.491) Pub Date : 2020-07-10
    Grigorios P. Zouros; Georgios D. Kolezas; Evangelos Almpanis; Konstantinos Baskourelos; Tomasz P. Stefański; Kosmas L. Tsakmakidis

    Magneto-optical materials have become a key tool in functional nanophotonics, mainly due to their ability to offer active tuning between two different operational states in subwavelength structures. In the long-wavelength limit, such states may be considered as the directional forward- and back-scattering operations, due to the interplay between magnetic and electric dipolar modes, which act as equivalent

    更新日期:2020-07-10
  • Thermoelectric graphene photodetectors with sub-nanosecond response times at terahertz frequencies
    Nanophotonics (IF 7.491) Pub Date : 2020-07-10
    Leonardo Viti; Alisson R. Cadore; Xinxin Yang; Andrei Vorobiev; Jakob E. Muench; Kenji Watanabe; Takashi Taniguchi; Jan Stake; Andrea C. Ferrari; Miriam S. Vitiello

    Ultrafast and sensitive (noise equivalent power <1 nW Hz−1/2) light-detection in the terahertz (THz) frequency range (0.1–10 THz) and at room-temperature is key for applications such as time-resolved THz spectroscopy of gases, complex molecules and cold samples, imaging, metrology, ultra-high-speed data communications, coherent control of quantum systems, quantum optics and for capturing snapshots

    更新日期:2020-07-10
  • Time-varying optical vortices enabled by time-modulated metasurfaces
    Nanophotonics (IF 7.491) Pub Date : 2020-07-10
    Hooman Barati Sedeh; Mohammad Mahdi Salary; Hossein Mosallaei

    In this paper, generation of optical vortices with time-varying orbital angular momentum (OAM) and topological charge is theoretically demonstrated based on time-modulated metasurfaces with a linearly azimuthal frequency gradient. The topological charge of such dynamic structured light beams is shown to continuously and periodically change with time evolution while possessing a linear dependence on

    更新日期:2020-07-10
  • Nanolaser-based emulators of spin Hamiltonians
    Nanophotonics (IF 7.491) Pub Date : 2020-07-11
    Midya Parto; William E. Hayenga; Alireza Marandi; Demetrios N. Christodoulides; Mercedeh Khajavikhan

    Finding the solution to a large category of optimization problems, known as the NP-hard class, requires an exponentially increasing solution time using conventional computers. Lately, there has been intense efforts to develop alternative computational methods capable of addressing such tasks. In this regard, spin Hamiltonians, which originally arose in describing exchange interactions in magnetic materials

    更新日期:2020-07-10
  • Simultaneously enhanced linear and nonlinear photon generations from WS2 by using dielectric circular Bragg resonators
    Nanophotonics (IF 7.491) Pub Date : 2020-07-06
    Bo Chen; Zhe He; Zhuo-Jun Liu; Yun-Kun Wang; Yu-Nan Gao; Igor Aharonovich; Zai-Quan Xu; Jin Liu

    Monolayer transition metal dichalcogenides (TMDs) have emerged as a promising platform for chip-integrated optoelectronics and non-linear optics. Here, we demonstrate a two-dimensional (2D) monolayer tungsten disulfide (WS2) efficiently coupled to a dielectric circular Bragg resonator (CBR). The coupling of the WS2 and CBR leads to pronounced enhancements in both photoluminescence (PL) and second harmonic

    更新日期:2020-07-09
  • Recent progress on applications of 2D material-decorated microfiber photonic devices in pulse shaping and all-optical signal processing
    Nanophotonics (IF 7.491) Pub Date : 2020-07-08
    Meng Liu; Zhi-Wei Wei; Ai-Ping Luo; Wen-Cheng Xu; Zhi-Chao Luo

    Due to the exotic electronic and optical properties, two-dimensional (2D) materials, such as graphene, topological insulators, transition metal dichalcogenides, black phosphorus, MXenes, graphitic carbon nitride, metal-organic frameworks, and so on, have attracted enormous interest in the scientific communities dealing with electronics and photonics. Combing the 2D materials with the microfiber, the

    更新日期:2020-07-08
  • Symmetry-tailored patterns and polarizations of single-photon emission
    Nanophotonics (IF 7.491) Pub Date : 2020-07-08
    Guorui Zhang; Ying Gu; Qihuang Gong; Jianjun Chen

    Due to small optical mode volumes and linear polarizations of surface-plasmon-polariton (SPP) resonant modes in metallic antennas, it is very difficult to obtain complex emission patterns and polarizations for single-photon emitters. Herein, nonresonant enhancement in a silver nanowire is used to both enhance emission rates and extract a z-oriented dipole, and then the symmetry of metallic nanostructures

    更新日期:2020-07-08
  • Selective surface-enhanced Raman scattering in a bulk nanoplasmonic Bi2O3-Ag eutectic composite
    Nanophotonics (IF 7.491) Pub Date : 2020-07-08
    Kamil Szlachetko; Piotr Piotrowski; Katarzyna Sadecka; Paweł Osewski; Dobrosława Kasprowicz; Dorota A. Pawlak

    A recent surge of interest in surface-enhanced Raman scattering (SERS) has stimulated the search for new systems that can be utilized to fabricate high-performance optical devices. However, the two-dimensional design of the vast majority of SERS-based assemblies has significantly hindered their real-life applicability, motivating the development of three-dimensional volumetric materials. Here, we report

    更新日期:2020-07-08
  • Active photonic platforms for the mid-infrared to the THz regime using spintronic structures
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Gaspar Armelles; Alfonso Cebollada

    Spintronics and Photonics constitute separately two disciplines of huge scientific and technological impact. Exploring their conceptual and practical overlap offers vast possibilities of research and a clear scope for the corresponding communities to merge and consider innovative ideas taking advantage of each other’s potentials. As an example, here we review the magnetic field modification of the

    更新日期:2020-07-06
  • Helicity-delinked manipulations on surface waves and propagating waves by metasurfaces
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Shiqing Li; Zhuo Wang; Shaohua Dong; Sixiong Yi; Fuxin Guan; Yizhen Chen; Huijie Guo; Qiong He; Lei Zhou; Shulin Sun

    Although many approaches have been proposed to manipulate propagating waves (PWs) and surface waves (SWs), usually each operation needs a separate meta-device, being unfavorable for optical integrations. Here, we propose a scheme to design a single meta-device that can efficiently generate SWs and/or PWs with pre-designed wavefronts, under the excitations of circularly polarized (CP) PWs with different

    更新日期:2020-07-06
  • Compact disordered magnetic resonators designed by simulated annealing algorithm
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Yaxin Xie; Menghao Liu; Tianhua Feng; Yi Xu

    Sub wavelength all-dielectric structures processing simultaneously electric and magnetic resonances provide a new horizon for tailoring magnetic light–matter interaction that is often overlooked in optical spectrum. In general, the magnetic field enhancement can be boosted by utilizing the magnetic resonances of dielectric resonators where structural disorder effect is considered as a parasitic negative

    更新日期:2020-07-06
  • Nonlinear nanophotonic devices in the ultraviolet to visible wavelength range
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Jinghan He; Hong Chen; Jin Hu; Jingan Zhou; Yingmu Zhang; Andre Kovach; Constantine Sideris; Mark C. Harrison; Yuji Zhao; Andrea M. Armani

    Although the first lasers invented operated in the visible, the first on-chip devices were optimized for near-infrared (IR) performance driven by demand in telecommunications. However, as the applications of integrated photonics has broadened, the wavelength demand has as well, and we are now returning to the visible (Vis) and pushing into the ultraviolet (UV). This shift has required innovations in

    更新日期:2020-07-06
  • Dual-polarized multiplexed meta-holograms utilizing coding metasurface
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Chunsheng Guan; Jian Liu; Xumin Ding; Zhuochao Wang; Kuang Zhang; Haoyu Li; Ming Jin; Shah Nawaz Burokur; Qun Wu

    In this paper, a novel method is proposed to achieve two distinct information channels by simultaneously manipulating both the transmitted cross- and co-polarized components of a 1-bit coding metasurface under linearly polarized incidence. Compared to previously demonstrated incidence-switchable or position multiplexed holograms, our proposed coding meta-hologram can simultaneously project two independent

    更新日期:2020-07-06
  • Advanced encryption method realized by secret shared phase encoding scheme using a multi-wavelength metasurface
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Zhenfei Li; Malin Premaratne; Weiren Zhu

    Multi-channel information encryption technology has been implemented by optical metasurfaces owing to their superior ability to control the phase, amplitude, wavelength and polarization of incident light. However, current metasurface-based multi-channel encryption technologies suffer from information leakage in non-full channel decoding processes. To better increase the security of the encrypted information

    更新日期:2020-07-06
  • A simple transfer-matrix model for metasurface multilayer systems
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Annemarie Berkhout; A. Femius Koenderink

    In this work we present a simple transfer-matrix based modeling tool for arbitrarily layered stacks of resonant plasmonic metasurfaces interspersed with dielectric and metallic multilayers. We present the application of this model by analyzing three seminal problems in nanophotonics. These are the scenario of perfect absorption in plasmonic Salisbury screens, strong coupling of microcavity resonances

    更新日期:2020-07-06
  • Misalignment resilient diffractive optical networks
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Deniz Mengu; Yifan Zhao; Nezih T. Yardimci; Yair Rivenson; Mona Jarrahi; Aydogan Ozcan

    As an optical machine learning framework, Diffractive Deep Neural Networks (D2NN) take advantage of data-driven training methods used in deep learning to devise light–matter interaction in 3D for performing a desired statistical inference task. Multi-layer optical object recognition platforms designed with this diffractive framework have been shown to generalize to unseen image data achieving, e.g

    更新日期:2020-07-06
  • Systematic studies for improving device performance of quantum well infrared stripe photodetectors
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Mel F. Hainey; Takaaki Mano; Takeshi Kasaya; Tetsuyuki Ochiai; Hirotaka Osato; Kazuhiro Watanabe; Yoshimasa Sugimoto; Takuya Kawazu; Yukinaga Arai; Akitsu Shigetou; Hideki T. Miyazaki

    The integration of quantum well infrared photodetectors with plasmonic cavities has allowed for demonstration of sensitive photodetectors in the mid-infrared up to room-temperature operating conditions. However, clear guidelines for optimizing device structure for these detectors have not been developed. Using simple stripe cavity detectors as a model system, we clarify the fundamental factors that

    更新日期:2020-07-06
  • Second harmonic generation in metasurfaces with multipole resonant coupling
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Aoxue Han; Colm Dineen; Viktoriia E. Babicheva; Jerome V. Moloney

    We report on the numerical demonstration of enhanced second harmonic generation (SHG) originating from collective resonances in plasmonic nanoparticle arrays. The nonlinear optical response of the metal nanoparticles is modeled by employing a hydrodynamic nonlinear Drude model implemented into Finite-Difference Time-Domain (FDTD) simulations, and effective polarizabilities of nanoparticle multipoles

    更新日期:2020-07-06
  • Flexibly tunable surface plasmon resonance by strong mode coupling using a random metal nanohemisphere on mirror
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Koichi Okamoto; Kota Okura; Pangpang Wang; Sou Ryuzaki; Kaoru Tamada

    We propose a unique random metal nanohemisphere on mirror (NHoM) structure to tune the surface plasmon (SP) resonance in a flexible manner. The SP resonance peak was split into two peaks owing to the strong coupling between the SP mode in the metal nanohemisphere and the mirror image mode generated in the metal substrate. This phenomenon is based on the fact that the strong coupling and the induced

    更新日期:2020-07-06
  • Tunable photoluminescence properties of selenium nanoparticles: biogenic versus chemogenic synthesis
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Elena Piacenza; Alessandro Presentato; Belinda Heyne; Raymond J. Turner

    Various technological and biomedical applications rely on the ability of materials to emit light (photoluminescence [PL]), and, among them, metal nanoparticles (NPs) and semi-conductor Quantum Dots (QDs) represent ideal candidates as sensing probes and imaging tools, portraying better PL features than conventional organic dyes. However, the knowledge of PL behavior of semiconductor NPs – i.e., selenium;

    更新日期:2020-07-06
  • Ultra-thin curved visible microdisk lasers with three-dimensional whispering gallery modes
    Nanophotonics (IF 7.491) Pub Date : 2020-07-04
    Taojie Zhou; Kar Wei Ng; Xiankai Sun; Zhaoyu Zhang

    Microdisk lasers are important components in photonic integrated circuits (PICs), of which the whispering gallery modes (WGMs) are usually confined within a two-dimensional (2D) planar slab. Here, owing to the strain relaxation of quantum wells by wet-etching method, we present ultra-thin curved visible microdisk lasers with single-mode lasing emission and a high quality factor of ∼17,000, which enable

    更新日期:2020-07-06
  • 2D Xenes: from fundamentals to applications
    Nanophotonics (IF 7.491) Pub Date : 2020-07-03
    Xiantao Jiang; Meng Zhang; Xi Ling; Pablo Alonso González; Han Zhang

    Journal Name: Nanophotonics Volume: 9 Issue: 7 Pages: 1555-1556

    更新日期:2020-07-05
  • Robust optical physical unclonable function using disordered photonic integrated circuits
    Nanophotonics (IF 7.491) Pub Date : 2020-07-03
    Farhan Bin Tarik; Azadeh Famili; Yingjie Lao; Judson D. Ryckman

    Physical unclonable function (PUF) has emerged as a promising and important security primitive for use in modern systems and devices, due to their increasingly embedded, distributed, unsupervised, and physically exposed nature. However, optical PUFs based on speckle patterns, chaos, or ‘strong’ disorder are so far notoriously sensitive to probing and/or environmental variations. Here we report an optical

    更新日期:2020-07-03
  • Real-time terahertz meta-cryptography using polarization-multiplexed graphene-based computer-generated holograms
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Hamid Rajabalipanah; Kasra Rouhi; Ali Abdolali; Shahid Iqbal; Lei Zhang; Shuo Liu

    As one of the cutting-edge technologies in advanced information science, wave-based cryptography is a prerequisite to enable a plethora of secure encrypting platforms which can be realized by smart multiplexing techniques together with suitable metasurface holograms (meta-holograms). Here, relying on the polarization multiplicity and re-writability of a computer-generated meta-hologram, a fully secure

    更新日期:2020-06-30
  • Reconfigurable topological waveguide based on honeycomb lattice of dielectric cuboids
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Xing-Xiang Wang; Xiao Hu

    We show that the photonic crystal (PhC) made of dielectric cuboids with their centers forming a honeycomb lattice is characterized by a ℤ2 topological index when the longer sides of six cuboids point towards the center of hexagonal unit cell. While the C6v symmetry regarding the center of unit cell is preserved, the C3 symmetry regarding honeycomb sites is broken, which opens a bandgap in the Dirac

    更新日期:2020-06-29
  • Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Apostolos Apostolakis; Mauro F. Pereira

    Semiconductor superlattices are strongly nonlinear media offering several technological challenges associated with the generation of high-frequency Gigahertz radiation and very effective frequency multiplication up to several Terahertzs. However, charge accumulation, traps and interface defects lead to pronounced asymmetries in the nonlinear current flow, from which high harmonic generation stems.

    更新日期:2020-06-29
  • Predictive and generative machine learning models for photonic crystals
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Thomas Christensen; Charlotte Loh; Stjepan Picek; Domagoj Jakobović; Li Jing; Sophie Fisher; Vladimir Ceperic; John D. Joannopoulos; Marin Soljačić

    The prediction and design of photonic features have traditionally been guided by theory-driven computational methods, spanning a wide range of direct solvers and optimization techniques. Motivated by enormous advances in the field of machine learning, there has recently been a growing interest in developing complementary data-driven methods for photonics. Here, we demonstrate several predictive and

    更新日期:2020-06-29
  • Direct routing of intensity-editable multi-beams by dual geometric phase interference in metasurface
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Guowen Ding; Ke Chen; Xinyao Luo; Guangxu Qian; Junming Zhao; Tian Jiang; Yijun Feng

    Controlling spin electromagnetic waves by ultra-thin Pancharatnam-Berry (PB) metasurfaces show promising prospects in the optical and wireless communications. One of the major challenge is to precisely control over the complex wavefronts and spatial power intensity characteristics without relying on massive algorithm optimizations, which requires independent amplitude and phase tuning. However, traditional

    更新日期:2020-06-29
  • Enhanced two-photon photoluminescence assisted by multi-resonant characteristics of a gold nanocylinder
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Artur Movsesyan; Gwénaëlle Lamri; Sergei Kostcheev; Anke Horneber; Annika Bräuer; Alfred J. Meixner; Monika Fleischer; Dai Zhang; Anne-Laure Baudrion; Pierre-Michel Adam

    Multi-resonant plasmonic simple geometries like nanocylinders and nanorods are highly interesting for two-photon photoluminescence and second harmonic generation applications, due to their easy fabrication and reproducibility in comparison with complex multi-resonant systems like dimers or nanoclusters. We demonstrate experimentally that by using a simple gold nanocylinder we can achieve a double resonantly

    更新日期:2020-06-29
  • Boron nitride for excitonics, nano photonics, and quantum technologies
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Bernard Gil; Guillaume Cassabois; Ramon Cusco; Giorgia Fugallo; Lluis Artus

    We review the recent progress regarding the physics and applications of boron nitride bulk crystals and its epitaxial layers in various fields. First, we highlight its importance from optoelectronics side, for simple devices operating in the deep ultraviolet, in view of sanitary applications. Emphasis will be directed towards the unusually strong efficiency of the exciton–phonon coupling in this indirect

    更新日期:2020-06-29
  • Dynamics of carbon nanotube-based mode-locking fiber lasers
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Lin Huang; Yusheng Zhang; Xueming Liu

    Carbon nanotube (CNT) can work as excellent saturable absorber (SA) due to its advantages of fast recovery, low saturation intensity, polarization insensitivity, deep modulation depth, broad operation bandwidth, outstanding environmental stability, and affordable fabrication. Its successful application as SA has promoted the development of scientific research and practical application of mode-locked

    更新日期:2020-06-29
  • Critical review of quantum plasmonic models for finite-size media
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Vincent Dorier; Stéphane Guérin; Hans-Rudolf Jauslin

    We provide a critical analysis of some of the commonly used theoretical models to describe quantum plasmons in finite size media. We summarize the standard approach based on a Fano diagonalization and we show explicit discrepancies in the obtained results by taking the limit of vanishing coupling between the electromagnetic field and the material medium. We then discuss the derivation of spontaneous

    更新日期:2020-06-29
  • Thermal-responsive multicolor emission of single NaGdF4:Yb/Ce/Ho upconversion nanocrystals for anticounterfeiting application
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Yanqing Hu; Qiyue Shao; Xinyi Deng; Jianqing Jiang

    This study presents a novel and high-level anticounterfeiting strategy based on Ce/Yb/Ho triply-doped NaGdF4 nanocrystals with temperature-responsive multicolor emission. A critical factor leading to the multicolor emission is confirmed by comparing the luminescence thermal behaviors of nanocrystals in various atmospheres. Through analyzing the temperature-dependent lifetimes of Yb3+ ions in air, we

    更新日期:2020-06-29
  • Nanoscale control of single molecule Förster resonance energy transfer by a scanning photonic nanoantenna
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Maria Sanz-Paz; Jerome Wenger; Niek F. van Hulst; Mathieu Mivelle; Maria F. Garcia-Parajo

    Förster Resonance Energy Transfer (FRET) is a widely applied technique in biology to accurately measure intra- and inter-molecular interactions at the nanometre scale. FRET is based on near-field energy transfer from an excited donor to a ground state acceptor emitter. Photonic nanoantennas have been shown to modify the rate, efficiency and extent of FRET, a process that is highly dependent on the

    更新日期:2020-06-29
  • High-efficiency, large-area lattice light-sheet generation by dielectric metasurfaces
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Fenghua Shi; Jing Wen; Dangyuan Lei

    Lattice light-sheet microscopy (LLSM) was developed for long-term live-cell imaging with ultra-fine three-dimensional (3D) spatial resolution, high temporal resolution, and low photo-toxicity by illuminating the sample with a thin lattice-like light-sheet. Currently available schemes for generating thin lattice light-sheets often require complex optical designs. Meanwhile, limited by the bulky objective

    更新日期:2020-06-29
  • Spatial multiplexing holographic combiner for glasses-free augmented reality
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Jiacheng Shi; Wen Qiao; Jianyu Hua; Ruibin Li; Linsen Chen

    Glasses-free augmented reality is of great interest by fusing virtual 3D images naturally with physical world without the aid of any wearable equipment. Here we propose a large-scale spatial multiplexing holographic see-through combiner for full-color 3D display. The pixelated metagratings with varied orientation and spatial frequency discretely reconstruct the propagating lightfield. The irradiance

    更新日期:2020-06-29
  • Ultrasensitive and fast photoresponse in graphene/silicon-on-insulator hybrid structure by manipulating the photogating effect
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Hao Jiang; Changbin Nie; Jintao Fu; Linlong Tang; Jun Shen; Feiying Sun; Jiuxun Sun; Meng zhu; Shuanglong Feng; Yang Liu; Haofei Shi; Xingzhan Wei

    The hybrid structures of graphene with semiconductor materials based on photogating effect have attracted extensive interest in recent years due to the ultrahigh responsivity. However, the responsivity (or gain) was increased at the expense of response time. In this paper, we devise a mechanism which can obtain an enhanced responsivity and fast response time simultaneously by manipulating the photogating

    更新日期:2020-06-29
  • Broadband photonic topological insulator based on triangular-holes array with higher energy filling efficiency
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Zhishen Zhang; Feng Li; Jiuyang Lu; Tao Liu; Xiaobo Heng; Yongcheng He; Haohua Liang; Jiulin Gan; Zhongmin Yang

    Photonic topological insulators (PTIs) bring markedly new opportunities to photonic devices with low dissipation and directional transmission of signal over a wide wavelength range due to the broadband topological protection. However, the maximum gap/mid-gap ratio of PTIs is below 10% and hardly further improved duo to the lack of new bandwidth enhancement mechanism. In this paper, a PTI with the gap/mid-gap

    更新日期:2020-06-29
  • Terahertz plasmonic phase-jump manipulator for liquid sensing
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Yi Huang; Shuncong Zhong; Tingting Shi; Yao-chun Shen; Daxiang Cui

    Terahertz (THz) plasmonic sensors has been regarded as exciting advances in biomedical engineering, due to their real-time, label-free, and ultrasensitive monitoring features. But actually, its widespread application remains impeded by poor modulation properties of operating frequency, single amplitude characterization method, and limited to low-loss substances. In the work, an ultraprecision THz sensor

    更新日期:2020-06-29
  • Pixeled metasurface for multiwavelength detection of vitamin D
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Valentina Di Meo; Alessio Crescitelli; Massimo Moccia; Annamaria Sandomenico; Angela M. Cusano; Marianna Portaccio; Maria Lepore; Vincenzo Galdi; Emanuela Esposito

    The steadily increasing demand for accurate analysis of vitamin D level, via measurement of its best general marker, 25-hydroxyvitamin D (25(OH)D), pushes for the development of novel automated assays capable of working at very low concentrations. Here, we propose a plasmonic biosensor of 25(OH)D3 (calcifediol) based on surface-enhanced infrared absorption spectroscopy, which exploits the resonant

    更新日期:2020-06-29
  • All-dielectric metasurfaces for polarization manipulation: principles and emerging applications
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Yueqiang Hu; Xudong Wang; Xuhao Luo; Xiangnian Ou; Ling Li; Yiqin Chen; Ping Yang; Shuai Wang; Huigao Duan

    Metasurfaces, composed of specifically designed subwavelength units in a two-dimensional plane, offer a new paradigm to design ultracompact optical elements that show great potentials for miniaturizing optical systems. In the past few decades, metasurfaces have drawn broad interests in multidisciplinary communities owing to their capability of manipulating various parameters of the light wave with

    更新日期:2020-06-29
  • Plasmonic nanostructures in photodetection, energy conversion and beyond
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Keng-Te Lin; Han Lin; Baohua Jia

    This review article aims to provide a comprehensive understanding of plasmonic nanostructures and their applications, especially on the integration of plasmonic nanostructures into devices. Over the past decades, plasmonic nanostructures and their applications have been intensively studied because of their outstanding features at the nanoscale. The fundamental characteristics of plasmonic nanostructures

    更新日期:2020-06-29
  • Optical anapole mode in nanostructured lithium niobate for enhancing second harmonic generation
    Nanophotonics (IF 7.491) Pub Date : 2020-06-29
    Yang Li; Zhijin Huang; Zhan Sui; Huajiang Chen; Xinyue Zhang; Weian Huang; Heyuan Guan; Wentao Qiu; Jiangli Dong; Wenguo Zhu; Jianhui Yu; Huihui Lu; Zhe Chen

    Second harmonic generation (SHG) with a material of large transparency is an attractive way of generating coherent light sources at exotic wavelength range such as VUV, UV and visible light. It is of critical importance to improve nonlinear conversion efficiency in order to find practical applications in quantum light source and high resolution nonlinear microscopy, etc. Here an enhanced SHG with conversion

    更新日期:2020-06-29
  • Optical spin-dependent beam separation in cyclic group symmetric metasurface
    Nanophotonics (IF 7.491) Pub Date : 2020-06-25
    Yeon Ui Lee; Igor Ozerov; Frédéric Bedu; Ji Su Kim; Frédéric Fages; Jeong Weon Wu

    Cross-polarization scattering of a circularly polarized beam from nano-rod introduces a geometric phase to the outgoing beam with opposite circular polarization. By manipulating the spatial array of subwavelength nano-structure constituting metasurface, the geometric phase can be engineered to generate a variety of beam profiles, including vortex beam carrying orbital angular momentum via a process

    更新日期:2020-06-25
  • NanoLEDs for energy-efficient and gigahertz-speed spike-based sub-λ neuromorphic nanophotonic computing
    Nanophotonics (IF 7.491) Pub Date : 2020-06-25
    Bruno Romeira; José M. L. Figueiredo; Julien Javaloyes

    Event-activated biological-inspired subwavelength (sub-λ) photonic neural networks are of key importance for future energy-efficient and high-bandwidth artificial intelligence systems. However, a miniaturized light-emitting nanosource for spike-based operation of interest for neuromorphic optical computing is still lacking. In this work, we propose and theoretically analyze a novel nanoscale nanophotonic

    更新日期:2020-06-25
  • Proposed method for highly selective resonant optical manipulation using counter-propagating light waves
    Nanophotonics (IF 7.491) Pub Date : 2020-06-25
    Takudo Wada; Hideki Fujiwara; Keiji Sasaki; Hajime Ishihara

    Optical manipulation using electronic resonance can realize the selective manipulation of nano objects exhibiting quantum mechanical properties by confining electronic systems based on the characteristics of individual objects. This study theoretically proposes a method to actualize selective manipulation based on the resonant optical response. In this method, counter-propagating light waves are used

    更新日期:2020-06-25
  • Generation of terahertz vector beams using dielectric metasurfaces via spin-decoupled phase control
    Nanophotonics (IF 7.491) Pub Date : 2020-06-25
    Yuehong Xu; Huifang Zhang; Quan Li; Xueqian Zhang; Quan Xu; Wentao Zhang; Cong Hu; Xixiang Zhang; Jiaguang Han; Weili Zhang

    Cylindrical vector beams (CVBs), being a special kind of beams with spatially variant states of polarizations, are promising in photonics applications, including high-resolution imaging, plasmon excitation, optical trapping, and laser machining. Recently, generating CVBs using metasurfaces has drawn enormous interest owing to their highly designable, multifunctional, and integratable features. However

    更新日期:2020-06-25
  • Computer generated optical volume elements by additive manufacturing
    Nanophotonics (IF 7.491) Pub Date : 2020-06-25
    Niyazi Ulas Dinc; Joowon Lim; Eirini Kakkava; Christophe Moser; Demetri Psaltis

    Computer generated optical volume elements have been investigated for information storage, spectral filtering, and imaging applications. Advancements in additive manufacturing (3D printing) allow the fabrication of multilayered diffractive volume elements in the micro-scale. For a micro-scale multilayer design, an optimization scheme is needed to calculate the layers. The conventional way is to optimize

    更新日期:2020-06-25
  • Broadband metamaterials and metasurfaces: a review from the perspectives of materials and devices
    Nanophotonics (IF 7.491) Pub Date : 2020-06-25
    Joonkyo Jung; Hyeonjin Park; Junhyung Park; Taeyong Chang; Jonghwa Shin

    Metamaterials can possess extraordinary properties not readily available in nature. While most of the early metamaterials had narrow frequency bandwidth of operation, many recent works have focused on how to implement exotic properties and functions over broad bandwidth for practical applications. Here, we provide two definitions of broadband operation in terms of effective material properties and

    更新日期:2020-06-25
  • Exact mapping between a laser network loss rate and the classical XY Hamiltonian by laser loss control
    Nanophotonics (IF 7.491) Pub Date : 2020-06-25
    Igor Gershenzon; Geva Arwas; Sagie Gadasi; Chene Tradonsky; Asher Friesem; Oren Raz; Nir Davidson

    Recently, there has been growing interest in the utilization of physical systems as heuristic optimizers for classical spin Hamiltonians. A prominent approach employs gain-dissipative optical oscillator networks for this purpose. Unfortunately, these systems inherently suffer from an inexact mapping between the oscillator network loss rate and the spin Hamiltonian due to additional degrees of freedom

    更新日期:2020-06-25
  • Phase-controlled metasurface design via optimized genetic algorithm
    Nanophotonics (IF 7.491) Pub Date : 2020-06-25
    Yulong Fan; Yunkun Xu; Meng Qiu; Wei Jin; Lei Zhang; Edmund Y. Lam; Din Ping Tsai; Dangyuan Lei

    In an optical Pancharatnam-Berry (PB) phase metasurface, each sub-wavelength dielectric structure of varied spatial orientation can be treated as a point source with the same amplitude yet varied relative phase. In this work, we introduce an optimized genetic algorithm (GA) method for the synthesis of one-dimensional (1D) PB phase-controlled dielectric metasurfaces by seeking for optimized phase profile

    更新日期:2020-06-25
  • Integrated photonic FFT for photonic tensor operations towards efficient and high-speed neural networks
    Nanophotonics (IF 7.491) Pub Date : 2020-06-26
    Moustafa Ahmed; Yas Al-Hadeethi; Ahmed Bakry; Hamed Dalir; Volker J. Sorger

    The technologically-relevant task of feature extraction from data performed in deep-learning systems is routinely accomplished as repeated fast Fourier transforms (FFT) electronically in prevalent domain-specific architectures such as in graphics processing units (GPU). However, electronics systems are limited with respect to power dissipation and delay, due to wire-charging challenges related to interconnect

    更新日期:2020-06-25
  • Superconducting nanowire single-photon detectors for quantum information
    Nanophotonics (IF 7.491) Pub Date : 2020-06-22
    Lixing You

    The superconducting nanowire single-photon detector (SNSPD) is a quantum-limit superconducting optical detector based on the Cooper-pair breaking effect by a single photon, which exhibits a higher detection efficiency, lower dark count rate, higher counting rate, and lower timing jitter when compared with those exhibited by its counterparts. SNSPDs have been extensively applied in quantum information

    更新日期:2020-06-24
  • Dynamic phase-change metafilm absorber for strong designer modulation of visible light
    Nanophotonics (IF 7.491) Pub Date : 2020-06-24
    Sun-Je Kim; Hansik Yun; Sungwook Choi; Jeong-Geun Yun; Kyungsoo Park; Sun Jae Jeong; Seung-Yeol Lee; Yohan Lee; Jangwoon Sung; Chulsoo Choi; Jongwoo Hong; Yong Wook Lee; Byoungho Lee

    Effective dynamic modulation of visible light properties has been significantly desired for advanced imaging and sensing technologies. In particular, phase-change materials have attracted much attention as active material platforms owing to their broadband tunability of optical dielectric functions induced by the temperature-dependent phase-changes. However, their uses for visible light modulators

    更新日期:2020-06-24
  • Perovskite nanowire lasers on low-refractive-index conductive substrate for high-Q and low-threshold operation
    Nanophotonics (IF 7.491) Pub Date : 2020-06-24
    Daria I. Markina; Anatoly P. Pushkarev; Ivan I. Shishkin; Filipp E. Komissarenko; Alexander S. Berestennikov; Alexey S. Pavluchenko; Irina P. Smirnova; Lev K. Markov; Mikas Vengris; Anvar A. Zakhidov; Sergey V. Makarov

    Over the last five years, inorganic lead halide perovskite nanowires have emerged as prospective candidates to supersede standard semiconductor analogs in advanced photonic designs and optoelectronic devices. In particular, CsPbX3 (X = Cl, Br, I) perovskite materials have great advantages over conventional semiconductors such as defect tolerance, highly efficient luminescence, and the ability to form

    更新日期:2020-06-24
  • Boolean learning under noise-perturbations in hardware neural networks
    Nanophotonics (IF 7.491) Pub Date : 2020-06-24
    Louis Andreoli; Xavier Porte; Stéphane Chrétien; Maxime Jacquot; Laurent Larger; Daniel Brunner

    A high efficiency hardware integration of neural networks benefits from realizing nonlinearity, network connectivity and learning fully in a physical substrate. Multiple systems have recently implemented some or all of these operations, yet the focus was placed on addressing technological challenges. Fundamental questions regarding learning in hardware neural networks remain largely unexplored. Noise

    更新日期:2020-06-24
  • Multiphysical sensing of light, sound and microwave in a microcavity Brillouin laser
    Nanophotonics (IF 7.491) Pub Date : 2020-06-24
    Jianfan Yang; Tian Qin; Fangxing Zhang; Xianfeng Chen; Xiaoshun Jiang; Wenjie Wan

    Light, sound, and microwave are important tools for many interdisciplinary applications in a multi-physical environment, and they usually are inefficient to be detected simultaneously in the same physical platform. However, at the microscopic scale, these waves can unexpectedly interact with the same microstructure through resonant enhancement, making it a unique hybrid micro-system for new applications

    更新日期:2020-06-24
  • Recent advances in mode-locked fiber lasers based on two-dimensional materials
    Nanophotonics (IF 7.491) Pub Date : 2020-06-24
    Junli Wang; Xiaoli Wang; Jingjing Lei; Mengyuan Ma; Cong Wang; Yanqi Ge; Zhiyi Wei

    Due to the unique properties of two-dimensional (2D) materials, much attention has been paid to the exploration and application of 2D materials. In this review, we focus on the application of 2D materials in mode-locked fiber lasers. We summarize the synthesis methods for 2D materials, fiber integration with 2D materials and 2D materials based saturable absorbers. We discuss the performance of the

    更新日期:2020-06-24
  • Visible to long-wave infrared chip-scale spectrometers based on photodetectors with tailored responsivities and multispectral filters
    Nanophotonics (IF 7.491) Pub Date : 2020-06-22
    Jasper J. Cadusch; Jiajun Meng; Benjamin J. Craig; Vivek Raj Shrestha; Kenneth B. Crozier

    Chip-scale microspectrometers, operational across the visible to long-wave infrared spectral region will enable many remote sensing spectroscopy applications in a variety of fields including consumer electronics, process control in manufacturing, as well as environmental and agricultural monitoring. The low weight and small device footprint of such spectrometers could allow for integration into handheld

    更新日期:2020-06-23
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