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Integrated and spectrally selective thermal emitters enabled by layered metamaterials Nanophotonics (IF 7.491) Pub Date : 2021-01-05 Yongkang Gong; Kang Li; Nigel Copner; Heng Liu; Meng Zhao; Bo Zhang; Andreas Pusch; Diana L. Huffaker; Sang Soon Oh
Nanophotonic engineering of light–matter interaction at subwavelength scale allows thermal radiation that is fundamentally different from that of traditional thermal emitters and provides exciting opportunities for various thermal-photonic applications. We propose a new kind of integrated and electrically controlled thermal emitter that exploits layered metamaterials with lithography-free and dielectric/metallic
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Ultrasensitive terahertz sensing with high-Q toroidal dipole resonance governed by bound states in the continuum in all-dielectric metasurface Nanophotonics (IF 7.491) Pub Date : 2021-01-05 Yulin Wang; Zhanghua Han; Yong Du; Jianyuan Qin
Toroidal dipole (TD) with weak coupling to the electromagnetic fields offers tremendous potential for advanced design of photonic devices. However, the excitation of high quality (Q) factor TD resonances in these devices is challenging. Here, we investigate ultrahigh-Q factor TD resonances at terahertz frequencies arising from a distortion of symmetry-protected bound states in the continuum (BIC) in
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Electrically injected parity-time symmetric distributed feedback laser diodes (DFB) for telecom applications Nanophotonics (IF 7.491) Pub Date : 2021-01-05 Vincent Brac de la Perrière; Quentin Gaimard; Henri Benisty; Abderrahim Ramdane; Anatole Lupu
The new paradigm of parity-time symmetry in quantum mechanics has readily been applied in the field of optics with numerous demonstrations of exotic properties in photonic systems. In this work, we report on the implementation of single frequency electrically injected distributed feedback (DFB) laser diodes based on parity-time symmetric dual gratings in a standard ridge waveguide configuration. We
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Formation of laser-induced periodic surface nanometric concentric ring structures on silicon surfaces through single-spot irradiation with orthogonally polarized femtosecond laser double-pulse sequences Nanophotonics (IF 7.491) Pub Date : 2021-01-05 Wei Liu; Jie Hu; Lan Jiang; Ji Huang; Jiangang Lu; Jiangang Yin; Zhaoling Qiu; Hailin Liu; Chen Li; Suocheng Wang; Shaojun Wang
In this study, we report the formation of laser-induced periodic surface nanometric concentric ring structures on silicon surfaces through single-spot irradiation with orthogonally polarized femtosecond laser double-pulse sequences (OP pulses). The period of the ring structures is marginally smaller than the irradiated laser’s wavelength, which indicates that the structures are a type of low-spatial-frequency
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Multiplexed supercell metasurface design and optimization with tandem residual networks Nanophotonics (IF 7.491) Pub Date : 2021-01-05 Christopher Yeung; Ju-Ming Tsai; Brian King; Benjamin Pham; David Ho; Julia Liang; Mark W. Knight; Aaswath P. Raman
Complex nanophotonic structures hold the potential to deliver exquisitely tailored optical responses for a range of applications. Metal–insulator–metal (MIM) metasurfaces arranged in supercells, for instance, can be tailored by geometry and material choice to exhibit a variety of absorption properties and resonant wavelengths. With this flexibility, however, comes a vast space of design possibilities
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End-to-end nanophotonic inverse design for imaging and polarimetry Nanophotonics (IF 7.491) Pub Date : 2020-12-23 Zin Lin; Charles Roques-Carmes; Raphaël Pestourie; Marin Soljačić; Arka Majumdar; Steven G. Johnson
By codesigning a metaoptical front end in conjunction with an image-processing back end, we demonstrate noise sensitivity and compactness substantially superior to either an optics-only or a computation-only approach, illustrated by two examples: subwavelength imaging and reconstruction of the full polarization coherence matrices of multiple light sources. Our end-to-end inverse designs couple the
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Far-field optical imaging of surface plasmons with a subdiffraction limited separation Nanophotonics (IF 7.491) Pub Date : 2020-12-18 Yifeng Xiang; Junxue Chen; Xi Tang; Ruxue Wang; Qiwen Zhan; Joseph R. Lakowicz; Douguo Zhang
When an ultrathin silver nanowire with a diameter less than 100 nm is placed on a photonic band gap structure, surface plasmons can be excited and propagate along two side-walls of the silver nanowire. Although the diameter of the silver nanowire is far below the diffraction limit, two bright lines can be clearly observed at the image plane by a standard wide-field optical microscope. Simulations suggest
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Expedited circular dichroism prediction and engineering in two-dimensional diffractive chiral metamaterials leveraging a powerful model-agnostic data enhancement algorithm Nanophotonics (IF 7.491) Pub Date : 2020-12-18 Shiyin Du; Jie You; Jun Zhang; Zilong Tao; Hao Hao; Yuhua Tang; Xin Zheng; Tian Jiang
A model-agnostic data enhancement (MADE) algorithm is proposed to comprehensively investigate the circular dichroism (CD) properties in the higher-order diffracted patterns of two-dimensional (2D) chiral metamaterials possessing different parameters. A remarkable feature of MADE algorithm is that it leverages substantially less data from a target problem and some training data from another already
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Digital nanophotonics: the highway to the integration of subwavelength-scale photonics: Ultra-compact, multi-function nanophotonic design based on computational inverse design Nanophotonics (IF 7.491) Pub Date : 2020-12-18 Jie Huang; Hansi Ma; Dingbo Chen; Huan Yuan; Jinping Zhang; Zikang Li; Jingmin Han; Jiagui Wu; Junbo Yang
Nanophotonic devices with high densities are extremely attractive because they can potentially merge photonics and electronics at the nanoscale. However, traditional integrated photonic circuits are designed primarily by manually selecting parameters or employing semi-analytical models. Limited by the small parameter search space, the designed nanophotonic devices generally have a single function,
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THz spintronic emitters: a review on achievements and future challenges Nanophotonics (IF 7.491) Pub Date : 2020-12-18 Evangelos Th. Papaioannou; René Beigang
The field of THz spintronics is a novel direction in the research field of nanomagnetism and spintronics that combines magnetism with optical physics and ultrafast photonics. The experimental scheme of the field involves the use of femtosecond laser pulses to trigger ultrafast spin and charge dynamics in thin films composed of ferromagnetic and nonmagnetic thin layers, where the nonmagnetic layer features
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Nanoscale confinement of energy deposition in glass by double ultrafast Bessel pulses Nanophotonics (IF 7.491) Pub Date : 2020-12-17 Jesus del Hoyo; Remi Meyer; Luca Furfaro; Francois Courvoisier
Ultrafast laser pulses spatially shaped as Bessel beams in dielectrics create high aspect ratio plasma channels whose relaxation can lead to the formation of nanochannels. We report a strong enhancement of the nanochannel drilling efficiency with illumination by double pulses separated by a delay between 10 and 500 ps. This enables the formation of nanochannels with diameters down to 100 nm. Experimental
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High-efficiency and high-speed germanium photodetector enabled by multiresonant photonic crystal Nanophotonics (IF 7.491) Pub Date : 2020-12-17 Jinwen Song; Shuai Yuan; Chengcong Cui; Yuxi Wang; Zhiyong Li; Alan X. Wang; Cheng Zeng; Jinsong Xia
High-efficiency and high-speed photodetectors with broadband responses are playing pivotal roles for wavelength-division multiplexing optical communications. Germanium photodetectors on silicon platforms exhibit potential cost advantage due to the compatibility for monolithic integration with silicon-based electronic circuits for signal amplification and processing. In this article, we report a normal
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Ligand-induced chirality and optical activity in semiconductor nanocrystals: theory and applications Nanophotonics (IF 7.491) Pub Date : 2020-11-09 Vera Kuznetsova; Yulia Gromova; Marina Martinez-Carmona; Finn Purcell-Milton; Elena Ushakova; Sergei Cherevkov; Vladimir Maslov; Yurii K. Gun’ko
Chirality is one of the most fascinating occurrences in the natural world and plays a crucial role in chemistry, biochemistry, pharmacology, and medicine. Chirality has also been envisaged to play an important role in nanotechnology and particularly in nanophotonics, therefore, chiral and chiroptical active nanoparticles (NPs) have attracted a lot of interest over recent years. Optical activity can
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Near-infrared dual-wavelength plasmonic switching and digital metasurface unveiled by plasmonic Fano resonance Nanophotonics (IF 7.491) Pub Date : 2020-11-11 Jie Ou; Xiao-Qing Luo; You-Lin Luo; Wei-Hua Zhu; Zhi-Yong Chen; Wu-Ming Liu; Xin-Lin Wang
Plasmonic Fano resonance (FR) that contributes to multitudinous potential applications in subwavelength nanostructures can facilitate the realization of tunable wavelength selectivity for controlling light–matter interactions in metasurfaces. However, the plasmonic FR can be generated in metasurfaces with simple or complex geometries, and few of them can support flexible amplitude modulation and multiwavelength
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Ultracompact and low-power-consumption silicon thermo-optic switch for high-speed data Nanophotonics (IF 7.491) Pub Date : 2020-11-11 Ruihuan Zhang; Yu He; Yong Zhang; Shaohua An; Qingming Zhu; Xingfeng Li; Yikai Su
Ultracompact and low-power-consumption optical switches are desired for high-performance telecommunication networks and data centers. Here, we demonstrate an on-chip power-efficient 2 × 2 thermo-optic switch unit by using a suspended photonic crystal nanobeam structure. A submilliwatt switching power of 0.15 mW is obtained with a tuning efficiency of 7.71 nm/mW in a compact footprint of 60 μm × 16 μm
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In situ charge carrier dynamics of semiconductor nanostructures for advanced photoelectrochemical and photocatalytic applications Nanophotonics (IF 7.491) Pub Date : 2020-11-16 Ting-Hsuan Lai; Ken-ichi Katsumata; Yung-Jung Hsu
Using in situ ultrafast laser spectroscopic techniques to monitor the charge dynamics of semiconductor photocatalysts under operating conditions is essential for digging out the veritable interactions between charge carriers and the reactive species. This real-time observation is desirable for optimizing individual components and their integration in advanced photoelectrochemical (PEC) and photocatalytic
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Subwavelength sorting of full-color based on anti-Hermitian metasurfaces Nanophotonics (IF 7.491) Pub Date : 2020-11-17 Seong Jun Kim; Changhyun Lee; Sangtae Jeon; Junghyun Park; Soo Jin Kim
Splitting the spectrum of incident light at nanoscale has been of great scientific and practical interest due to its potential application in various optical sensors. For many years, researchers have been striving to realize the full-color sorting of light at subwavelength scale, while keeping the loss of incident photons to a minimum. In this article, we present semiconductor-based metasurfaces that facilitate
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Large-scale, power-efficient Au/VO2 active metasurfaces for ultrafast optical modulation Nanophotonics (IF 7.491) Pub Date : 2020-11-17 Tongtong Kang; Zongwei Ma; Jun Qin; Zheng Peng; Weihao Yang; Taixing Huang; Shilin Xian; Shuang Xia; Wei Yan; Yucong Yang; Zhigao Sheng; Jian Shen; Chaoyang Li; Longjiang Deng; Lei Bi
Active metasurfaces, in which the optical property of a metasurface device can be controlled by external stimuli, have attracted great research interest recently. For optical switching and modulation applications, high-performance active metasurfaces need to show high transparency, high power efficiency, as well as ultrafast switching and large-scale fabrication capability. This paper reports Au/VO2-based
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Nanostructured inorganic electrochromic materials for light applications Nanophotonics (IF 7.491) Pub Date : 2020-11-20 Wu Zhang; Haizeng Li; Eric Hopmann; Abdulhakem Y. Elezzabi
Electrochromism, an emerging energy conversion technology, has attracted immense interest due to its various applications including bistable displays, optical filters, variable optical attenuators, optical switches, and energy-efficient smart windows. Currently, the major drawback for the development of electrochromism is the slow switching speed, especially in inorganic electrochromic materials. The
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Surface plasmon polariton–enhanced photoluminescence of monolayer MoS2 on suspended periodic metallic structures Nanophotonics (IF 7.491) Pub Date : 2020-11-24 Huanhuan Su; Shan Wu; Yuhan Yang; Qing Leng; Lei Huang; Junqi Fu; Qianjin Wang; Hui Liu; Lin Zhou
Plasmonic nanostructures have garnered tremendous interest in enhanced light–matter interaction because of their unique capability of extreme field confinement in nanoscale, especially beneficial for boosting the photoluminescence (PL) signals of weak light–matter interaction materials such as transition metal dichalcogenides atomic crystals. Here we report the surface plasmon polariton (SPP)-assisted
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Carbon nanotube mode-locked fiber lasers: recent progress and perspectives Nanophotonics (IF 7.491) Pub Date : 2020-11-24 Lilong Dai; Zinan Huang; Qianqian Huang; Chang Zhao; Aleksey Rozhin; Sergey Sergeyev; Mohammed Al Araimi; Chengbo Mou
Carbon nanotubes (CNTs) possess remarkable nonlinear optical properties; a particular application is to function as a mode locker used in ultrafast fiber lasers to produce ultrashort optical pulses. Various types of CNT saturable absorbers (SAs) and ultrafast fiber lasers have been demonstrated. In this review, typical fabrication process and development of CNT SAs are discussed and we highlight the
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Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability Nanophotonics (IF 7.491) Pub Date : 2020-11-26 Chunghwan Jung; Younghwan Yang; Jaehyuck Jang; Trevon Badloe; Taejun Lee; Jungho Mun; Seong-Won Moon; Junsuk Rho
Structural coloration using metasurfaces has been steadily researched to overcome the limitations of conventional color printing using pigments by improving the resolution, lowering the toxicity, and increasing the durability. Many metasurfaces have been demonstrated for dynamic structural coloration to convert images at the visible spectrum. However, the previous works cannot reach near-zero scattering
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Raman scattering in high-refractive-index nanostructures Nanophotonics (IF 7.491) Pub Date : 2020-12-16 Søren Raza; Anders Kristensen
The advent of resonant dielectric nanomaterials has provided a new path for concentrating and manipulating light on the nanoscale. Such high-refractive-index materials support a diverse set of low-loss optical resonances, including Mie resonances, anapole states, and bound states in the continuum. Through these resonances, high-refractive-index materials can be used to engineer the optical near field
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Lead-free metal-halide double perovskites: from optoelectronic properties to applications Nanophotonics (IF 7.491) Pub Date : 2020-12-16 Mehri Ghasemi; Mengmeng Hao; Mu Xiao; Peng Chen; Dongxu He; Yurou Zhang; Weijian Chen; Jiandong Fan; Jung H. Yun; Baohua Jia; Xiaoming Wen
Lead (Pb) halide perovskites have witnessed highly promising achievements for high-efficiency solar cells, light-emitting diodes (LEDs), and photo/radiation detectors due to their exceptional optoelectronic properties. However, compound stability and Pb toxicity are still two main obstacles towards the commercialization of halide perovskite-based devices. Therefore, it is of substantial interest to
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Machine learning–assisted global optimization of photonic devices Nanophotonics (IF 7.491) Pub Date : 2020-10-28 Zhaxylyk A. Kudyshev; Alexander V. Kildishev; Vladimir M. Shalaev; Alexandra Boltasseva
Over the past decade, artificially engineered optical materials and nanostructured thin films have revolutionized the area of photonics by employing novel concepts of metamaterials and metasurfaces where spatially varying structures yield tailorable “by design” effective electromagnetic properties. The current state-of-the-art approach to designing and optimizing such structures relies heavily on simplistic
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High-Q nanophotonics: sculpting wavefronts with slow light Nanophotonics (IF 7.491) Pub Date : 2020-10-29 David Barton; Jack Hu; Jefferson Dixon; Elissa Klopfer; Sahil Dagli; Mark Lawrence; Jennifer Dionne
Densely interconnected, nonlinear, and reconfigurable optical networks represent a route to high-performance optical computing, communications, and sensing technologies. Dielectric nanoantennas are promising building blocks for such architectures since they can precisely control optical diffraction. However, they are traditionally limited in their nonlinear and reconfigurable responses owing to their
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Polariton panorama Nanophotonics (IF 7.491) Pub Date : 2020-11-11 D. N. Basov; Ana Asenjo-Garcia; P. James Schuck; Xiaoyang Zhu; Angel Rubio
In this brief review, we summarize and elaborate on some of the nomenclature of polaritonic phenomena and systems as they appear in the literature on quantum materials and quantum optics. Our summary includes at least 70 different types of polaritonic light–matter dressing effects. This summary also unravels a broad panorama of the physics and applications of polaritons. A constantly updated version
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Silicon–germanium receivers for short-wave-infrared optoelectronics and communications: High-speed silicon–germanium receivers (invited review) Nanophotonics (IF 7.491) Pub Date : 2020-12-08 Daniel Benedikovic; Léopold Virot; Guy Aubin; Jean-Michel Hartmann; Farah Amar; Xavier Le Roux; Carlos Alonso-Ramos; Éric Cassan; Delphine Marris-Morini; Jean-Marc Fédéli; Frédéric Boeuf; Bertrand Szelag; Laurent Vivien
Integrated silicon nanophotonics has rapidly established itself as intriguing research field, whose outlets impact numerous facets of daily life. Indeed, nanophotonics has propelled many advances in optoelectronics, information and communication technologies, sensing and energy, to name a few. Silicon nanophotonics aims to deliver compact and high-performance components based on semiconductor chips
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Achromatic terahertz Airy beam generation with dielectric metasurfaces Nanophotonics (IF 7.491) Pub Date : 2020-12-14 Qingqing Cheng; Juncheng Wang; Ling Ma; Zhixiong Shen; Jing Zhang; Xiaoying Zheng; Tao Chen; Ye Yu; Dong Yu; Qiong He; Wei Hu; Tao Li; Songlin Zhuang; Lei Zhou
Airy beams exhibit intriguing properties such as nonspreading, self-bending, and self-healing and have attracted considerable recent interest because of their many potential applications in photonics, such as to beam focusing, light-sheet microscopy, and biomedical imaging. However, previous approaches to generate Airy beams using photonic structures have suffered from severe chromatic problems arising
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Double moiré localized plasmon structured illumination microscopy Nanophotonics (IF 7.491) Pub Date : 2020-12-14 Ruslan Röhrich; A. Femius Koenderink
Structured illumination microscopy (SIM) is a well-established fluorescence imaging technique, which can increase spatial resolution by up to a factor of two. This article reports on a new way to extend the capabilities of structured illumination microscopy, by combining ideas from the fields of illumination engineering and nanophotonics. In this technique, plasmonic arrays of hexagonal symmetry are
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Directional launching of surface plasmon polaritons by electrically driven aperiodic groove array reflectors Nanophotonics (IF 7.491) Pub Date : 2020-12-14 Yuanhai Lin; Thanh Xuan Hoang; Hong-Son Chu; Christian A. Nijhuis
Access to surface plasmon polaritons (SPPs) with directional control excited by electrical means is important for applications in (on-chip) nano-optoelectronic devices and to circumvent limitations inherent to approaches where SPPs are excited by optical means (e.g., diffraction limit). This paper describes directional excitation of surface plasmon polaritons propagating along a plasmonic strip waveguide
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Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond Nanophotonics (IF 7.491) Pub Date : 2020-11-16 Raymond A. Wambold; Zhaoning Yu; Yuzhe Xiao; Benjamin Bachman; Gabriel Jaffe; Shimon Kolkowitz; Jennifer T. Choy; Mark A. Eriksson; Robert J. Hamers; Mikhail A. Kats
We designed a nanoscale light extractor (NLE) for the efficient outcoupling and beaming of broadband light emitted by shallow, negatively charged nitrogen-vacancy (NV) centers in bulk diamond. The NLE consists of a patterned silicon layer on diamond and requires no etching of the diamond surface. Our design process is based on adjoint optimization using broadband time-domain simulations and yields
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Thomas–Reiche–Kuhn (TRK) sum rule for interacting photons Nanophotonics (IF 7.491) Pub Date : 2020-11-18 Salvatore Savasta; Omar Di Stefano; Franco Nori
The Thomas–Reiche–Kuhn (TRK) sum rule is a fundamental consequence of the position–momentum commutation relation for an atomic electron, and it provides an important constraint on the transition matrix elements for an atom. Here, we propose a TRK sum rule for electromagnetic fields which is valid even in the presence of very strong light–matter interactions and/or optical nonlinearities. While the
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Disorder effects in nitride semiconductors: impact on fundamental and device properties Nanophotonics (IF 7.491) Pub Date : 2020-11-18 Claude Weisbuch; Shuji Nakamura; Yuh-Renn Wu; James S. Speck
Semiconductor structures used for fundamental or device applications most often incorporate alloy materials. In “usual” or “common” III–V alloys, based on the InGaAsP or InGaAlAs material systems, the effects of compositional disorder on the electronic properties can be treated in a perturbative approach. This is not the case in the more recent nitride-based GaInAlN alloys, where the potential changes
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Optical response of jammed rectangular nanostructures Nanophotonics (IF 7.491) Pub Date : 2020-11-24 Mutasem Odeh; Matthieu Dupré; Kevin Kim; Boubacar Kanté
Random jammed dipole scatterers are natural composite and common byproducts of various chemical synthesis techniques. They often form complex aggregates with nontrivial correlations that influence the effective dielectric description of the medium. In this work, we investigate the packing dynamic of rectangular nanostructure under a close packing protocol and study its influence on the optical response
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The road to atomically thin metasurface optics Nanophotonics (IF 7.491) Pub Date : 2020-11-25 Mark L. Brongersma
The development of flat optics has taken the world by storm. The initial mission was to try and replace conventional optical elements by thinner, lightweight equivalents. However, while developing this technology and learning about its strengths and limitations, researchers have identified a myriad of exciting new opportunities. It is therefore a great moment to explore where flat optics can really
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Epitaxial aluminum plasmonics covering full visible spectrum Nanophotonics (IF 7.491) Pub Date : 2020-11-25 Chang-Wei Cheng; Soniya S. Raja; Ching-Wen Chang; Xin-Quan Zhang; Po-Yen Liu; Yi-Hsien Lee; Chih-Kang Shih; Shangjr Gwo
Aluminum has attracted a great deal of attention as an alternative plasmonic material to silver and gold because of its natural abundance on Earth, material stability, unique spectral capability in the ultraviolet spectral region, and complementary metal-oxide-semiconductor compatibility. Surprisingly, in some recent studies, aluminum has been reported to outperform silver in the visible range due
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Artificial neural networks for inverse design of resonant nanophotonic components with oscillatory loss landscapes Nanophotonics (IF 7.491) Pub Date : 2020-11-30 Joeri Lenaerts; Hannah Pinson; Vincent Ginis
Machine learning offers the potential to revolutionize the inverse design of complex nanophotonic components. Here, we propose a novel variant of this formalism specifically suited for the design of resonant nanophotonic components. Typically, the first step of an inverse design process based on machine learning is training a neural network to approximate the non-linear mapping from a set of input
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Editorial Nanophotonics (IF 7.491) Pub Date : 2020-12-01 Dennis Couwenberg; Federico Capasso
Journal Name: Nanophotonics Volume: 10 Issue: 1 Pages: 1-1
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Seeing the light in energy use Nanophotonics (IF 7.491) Pub Date : 2020-12-04 Harry A. Atwater
Journal Name: Nanophotonics Volume: 10 Issue: 1 Pages: 115-116
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Interface-induced field-like optical spin torque in a ferromagnet/heavy metal heterostructure Nanophotonics (IF 7.491) Pub Date : 2020-12-04 Satoshi Iihama; Kazuaki Ishibashi; Shigemi Mizukami
The manipulation of magnetization in a metallic ferromagnet by using optical helicity has been much attracted attention for future opto-spintronic devices. The optical helicity–induced torques on the magnetization, optical spin torque, have been observed in ferromagnetic thin films recently. However, the interfacial effect of the optical spin torque in ferromagnet/nonmagnetic heavy metal heterostructures
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Significantly enhanced second-harmonic generations with all-dielectric antenna array working in the quasi-bound states in the continuum and excited by linearly polarized plane waves Nanophotonics (IF 7.491) Pub Date : 2020-12-04 Zhanghua Han; Fei Ding; Yangjian Cai; Uriel Levy
The recently emerging all-dielectric optical nanoantennas based on high-index semiconductors have proven to be an effective and low-loss alternative to metal-based plasmonic structures for light control and manipulations of light–matter interactions. Nonlinear optical effects have been widely investigated to employ the enhanced interactions between incident light and the dielectrics at the Mie-type
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Recent progress of dynamic mode manipulation via acousto-optic interactions in few-mode fiber lasers: mechanism, device and applications Nanophotonics (IF 7.491) Pub Date : 2020-11-24 Jiafeng Lu; Fan Shi; Jiangtao Xu; Linghao Meng; Longkun Zhang; Peikang Cheng; Xuan Zhou; Fufei Pang; Xianglong Zeng
The burgeoning advances of spatial mode conversion in few-mode fibers emerge as the investigative hotspot in novel structured light manipulation, in that, high-order modes possess a novel fundamental signature of various intensity profiles and unique polarization distributions, especially orbital angular momentum modes carrying with phase singularity and spiral wave front. Thus, control of spatial
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Engineering photonic environments for two-dimensional materials Nanophotonics (IF 7.491) Pub Date : 2020-11-19 Xuezhi Ma; Nathan Youngblood; Xiaoze Liu; Yan Cheng; Preston Cunha; Kaushik Kudtarkar; Xiaomu Wang; Shoufeng Lan
A fascinating photonic platform with a small device scale, fast operating speed, as well as low energy consumption is two-dimensional (2D) materials, thanks to their in-plane crystalline structures and out-of-plane quantum confinement. The key to further advancement in this research field is the ability to modify the optical properties of the 2D materials. The modifications typically come from the
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Surface plasmon polariton pulse shaping via two-dimensional Bragg grating pairs Nanophotonics (IF 7.491) Pub Date : 2020-11-09 Kevin T. Crampton; Alan G. Joly; Patrick Z. El-Khoury
We demonstrate control over the spatial and temporal properties of surface plasmon polaritons (SPPs) launched from nanohole arrays in silver. The arrays provide wave vector matching to allow the conversion of free-space photons into counter-propagating SPPs. SPPs launched from multiple arrays interfere at well-defined spatial positions, and the interference fringes form an all-SPP periodic nano-optical
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Passive photonic diodes based on natural van der Waals heterostructures Nanophotonics (IF 7.491) Pub Date : 2020-11-09 Jie Li; Lin Du; Jing Huang; Yuan He; Jun Yi; Lili Miao; Chujun Zhao; Shuangchun Wen
Van der Waals heterostructures are composed of stacked atomically thin two-dimensional (2D) crystals to provide unprecedented functionalities and novel physics. Franckeite, a naturally occurring van der Waals heterostructure consisting of superimposed SnS2-like and PbS-like layers alternately, shows intriguing potential in versatile optoelectronic applications. Here, we have prepared the few-layer
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Valley depolarization in downconversion and upconversion emission of monolayer WS2 at room temperature Nanophotonics (IF 7.491) Pub Date : 2020-10-16 Han Li; Yating Ma; Yizhen Sui; Yuxiang Tang; Ke Wei; Xiang’ai Cheng; Tian Jiang
Benefiting from strong photon–exciton and phonon–exciton interactions in atomic thickness, transition metal dichalcogenides (TMDCs) are viewed as one promising platform for exploring elementary excitonic photoluminescence (PL) and intrinsic spin–valley properties at the monolayer limit. Despite well-studied Stokes downconversion (DC) PL, the anti-Stokes upconversion (UC) PL has been recently reported
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A large field-of-view metasurface for complex-amplitude hologram breaking numerical aperture limitation Nanophotonics (IF 7.491) Pub Date : 2020-10-16 Yongheng Mu; Mengyao Zheng; Jiaran Qi; Hongmei Li; Jinghui Qiu
Owing to the potential to manipulate simultaneously amplitude and phase of electromagnetic wave, complex-amplitude holographic metasurfaces (CAHMs) can achieve improved image-reconstruction quality compared with amplitude-only and phase-only ones. However, prevailing design methods based on Huygens–Fresnel theory for CAHMs, e.g., Rayleigh–Sommerfeld diffraction theory (RSDT), restrict acquisition of
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Scaling capacity of fiber-optic transmission systems via silicon photonics Nanophotonics (IF 7.491) Pub Date : 2020-10-22 Wei Shi; Ye Tian; Antoine Gervais
The tremendous growth of data traffic has spurred a rapid evolution of optical communications for a higher data transmission capacity. Next-generation fiber-optic communication systems will require dramatically increased complexity that cannot be obtained using discrete components. In this context, silicon photonics is quickly maturing. Capable of manipulating electrons and photons on the same platform
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Dimensional confinement and waveguide effect of Dyakonov surface waves in twisted confined media Nanophotonics (IF 7.491) Pub Date : 2020-10-26 Dmitry A. Chermoshentsev; Evgeny V. Anikin; Sergey A. Dyakov; Nikolay A. Gippius
We theoretically study Dyakonov surface waveguide modes that propagate along the planar strip interfacial waveguide between two uniaxial dielectrics. We demonstrate that owing to the one-dimensional electromagnetic confinement, Dyakonov surface waveguide modes can propagate in the directions that are forbidden for the classical Dyakonov surface waves at the infinite interface. We show that this situation
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Hydrophobic multiscale cavities for high-performance and self-cleaning surface-enhanced Raman spectroscopy (SERS) sensing Nanophotonics (IF 7.491) Pub Date : 2020-10-26 Xiaofei Zhao; Chundong Liu; Jing Yu; Zhen Li; Lu Liu; Chonghui Li; Shicai Xu; Weifeng Li; Baoyuan Man; Chao Zhang
Cavity array, with excellent optical capture capability, has received increasing attention for the surface-enhanced Raman spectroscopy (SERS)-active substrates. Here, we proposed molybdenum disulfide (MoS2) nanocavities growing on pyramid Si (PSi) composed of in situ reduced Au nanoparticles (AuNPs), which can form the multiscale cavities (MSCs), and is facile for the couple of the plasmon. We demonstrated
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High refractive index and extreme biaxial optical anisotropy of rhenium diselenide for applications in all-dielectric nanophotonics Nanophotonics (IF 7.491) Pub Date : 2020-10-28 Anton A. Shubnic; Roman G. Polozkov; Ivan A. Shelykh; Ivan V. Iorsh
We establish a simple quantitative criterium for the search of new dielectric materials with high values of refractive index in the visible range. It is demonstrated, that for light frequencies below the bandgap, the latter is determined by the dimensionless parameter η calculated as the ratio of the sum of the widths of conduction and valence bands and the bandgap. Small values of this parameter,
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Polarization-selected nonlinearity transition in gold dolmens coupled to an epsilon-near-zero material Nanophotonics (IF 7.491) Pub Date : 2020-10-29 Xinxiang Niu; Xiaoyong Hu; Quan Sun; Cuicui Lu; Yuanmu Yang; Hong Yang; Qihuang Gong
Nonlinear optical materials are cornerstones of modern optics including ultrafast lasers, optical computing, and harmonic generation. The nonlinear coefficients of optical materials suffer from limitations in strength and bandwidth. Also, the nonlinear performance is typically monotonous without polarization selectivity, and to date, no natural material has been found to possess nonlinear coefficients
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Wide-gap photoluminescence control of quantum dots through atomic interdiffusion and bandgap renormalization Nanophotonics (IF 7.491) Pub Date : 2020-10-29 Kyoung-Duck Park; Minh Tan Man; Deok-Yong Cho; Hong Seok Lee
Bandgap and photoluminescence (PL) energy control of epitaxially grown II–VI quantum dots (QDs) are highly desirable for applications in optoelectronic devices, yet little work has been reported. Here, we present a wide tunability of PL emission for CdTe/ZnTe QDs through an impurity-free vacancy disordering method. To induce compressive stress at the dielectric layer/ZnTe interface, a SiO2 film is
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Polarization-sensitive photodetectors based on three-dimensional molybdenum disulfide (MoS2) field-effect transistors Nanophotonics (IF 7.491) Pub Date : 2020-10-29 Tao Deng; Shasha Li; Yuning Li; Yang Zhang; Jingye Sun; Weijie Yin; Weidong Wu; Mingqiang Zhu; Yingxin Wang; Zewen Liu
The molybdenum disulfide (MoS2)-based photodetectors are facing two challenges: the insensitivity to polarized light and the low photoresponsivity. Herein, three-dimensional (3D) field-effect transistors (FETs) based on monolayer MoS2 were fabricated by applying a self–rolled-up technique. The unique microtubular structure makes 3D MoS2 FETs become polarization sensitive. Moreover, the microtubular
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Large-scale monolayer molybdenum disulfide (MoS2) for mid-infrared photonics Nanophotonics (IF 7.491) Pub Date : 2020-10-29 Han Pan; Hongwei Chu; Zhongben Pan; Shengzhi Zhao; Ming Yang; Jianwei Chai; Shijie Wang; Dongzhi Chi; Dechun Li
Mid-infrared (MIR) photonics has attracted tremendous interest because of its broad applications at atmospheric windows. In this work, we report high-performance MIR photonics based on large-scale and good-quality monolayer molybdenum disulfide (MoS2). The open-aperture Z-scan measurement on the nonlinear saturable absorption features shows that the as-grown monolayer MoS2 possesses a modulation depth
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Dynamically controlling local field enhancement at an epsilon-near-zero/dielectric interface via nonlinearities of an epsilon-near-zero medium Nanophotonics (IF 7.491) Pub Date : 2020-11-02 Alexander Baev; Paras N. Prasad; M. Zahirul Alam; Robert W. Boyd
For p-polarized light incident on an interface between an ordinary dielectric and an epsilon-near-zero (ENZ) material, an enhancement of the component of the electric field, normal to this interface, has been shown to occur. This local field enhancement holds great promise for amplifying nonlinear optical processes and for other applications requiring ultrastrong local fields in epsilon-near-zero based
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Recent advances in fluorescence probes based on carbon dots for sensing and speciation of heavy metals Nanophotonics (IF 7.491) Pub Date : 2020-11-06 Pingjing Li; Sam F. Y. Li
Heavy metal (HM) pollution is a major global concern. Carbon dots (CDs) have demonstrated unique properties as sensing platforms for HMs detection. This review summarizes the progress made in recent years in fluorescence methods to determine HMs and their species using CDs. First, the strategies to synthesize and purify CDs are reviewed. The photoluminescence principles of CDs and their sensing mechanisms
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NIST-certified secure key generation via deep learning of physical unclonable functions in silica aerogels Nanophotonics (IF 7.491) Pub Date : 2020-10-28 Andrea Fratalocchi; Adam Fleming; Claudio Conti; Andrea Di Falco
Physical unclonable functions (PUFs) are complex physical objects that aim at overcoming the vulnerabilities of traditional cryptographic keys, promising a robust class of security primitives for different applications. Optical PUFs present advantages over traditional electronic realizations, namely, a stronger unclonability, but suffer from problems of reliability and weak unpredictability of the
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Temporally modulated energy shuffling in highly interconnected nanosystems Nanophotonics (IF 7.491) Pub Date : 2020-10-29 Brandon Mitchell; Hayley Austin; Dolf Timmerman; Volkmar Dierolf; Yasufumi Fujiwara
Advances in lighting and quantum computing will require new degrees of control over the emission of photons, where localized defects and the quantum confinement of carriers can be utilized. In this contribution, recent developments in the controlled redistribution of energy in rare earth (RE)–doped nanosystems, such as quantum dots or within bulk insulating and semiconducting hosts, will be reviewed
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