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  • Opening a new route to multiport coherent XUV sources via intracavity high-order harmonic generation
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-24
    Natsuki Kanda; Tomohiro Imahoko; Koji Yoshida; Akihiro Tanabashi; A. Amani Eilanlou; Yasuo Nabekawa; Tetsumi Sumiyoshi; Makoto Kuwata-Gonokami; Katsumi Midorikawa

    High-order harmonic generation (HHG) is currently utilized for developing compact table-top radiation sources to provide highly coherent extreme ultraviolet (XUV) and soft X-ray pulses; however, the low repetition rate of fundamental lasers, which is typically in the multi-kHz range, restricts the area of application for such HHG-based radiation sources. Here, we demonstrate a novel method for realizing

    更新日期:2020-09-24
  • Light-modulated vertical heterojunction phototransistors with distinct logical photocurrents
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-23
    Jiayue Han; Meiyu He; Ming Yang; Qi Han; Fang Wang; Fang Zhong; Mengjian Xu; Qing Li; He Zhu; Chongxin Shan; Weida Hu; Xiaoqing Chen; Xinran Wang; Jun Gou; Zhiming Wu; Jun Wang

    The intriguing carrier dynamics in graphene heterojunctions have stimulated great interest in modulating the optoelectronic features to realize high-performance photodetectors. However, for most phototransistors, the photoresponse characteristics are modulated with an electrical gate or a static field. In this paper, we demonstrate a graphene/C60/pentacene vertical phototransistor to tune both the

    更新日期:2020-09-23
  • Turning a hot spot into a cold spot: polarization-controlled Fano-shaped local-field responses probed by a quantum dot
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-21
    Juan Xia; Jianwei Tang; Fanglin Bao; Yongcheng Sun; Maodong Fang; Guanjun Cao; Julian Evans; Sailing He

    Optical nanoantennas can convert propagating light to local fields. The local-field responses can be engineered to exhibit nontrivial features in spatial, spectral and temporal domains, where local-field interferences play a key role. Here, we design nearly fully controllable local-field interferences in the nanogap of a nanoantenna, and experimentally demonstrate that in the nanogap, the spectral

    更新日期:2020-09-21
  • Converting lateral scanning into axial focusing to speed up three-dimensional microscopy
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-18
    Tonmoy Chakraborty; Bingying Chen; Stephan Daetwyler; Bo-Jui Chang; Oliver Vanderpoorten; Etai Sapoznik; Clemens F. Kaminski; Tuomas P. J. Knowles; Kevin M. Dean; Reto Fiolka

    In optical microscopy, the slow axial scanning rate of the objective or the sample has traditionally limited the speed of volumetric imaging. Recently, by conjugating either a movable mirror to the image plane in a remote-focusing geometry or an electrically tuneable lens (ETL) to the back focal plane, rapid axial scanning has been achieved. However, mechanical actuation of a mirror limits the axial

    更新日期:2020-09-20
  • Perovskite light-emitting/detecting bifunctional fibres for wearable LiFi communication
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-16
    Qingsong Shan; Changting Wei; Yan Jiang; Jizhong Song; Yousheng Zou; Leimeng Xu; Tao Fang; Tiantian Wang; Yuhui Dong; Jiaxin Liu; Boning Han; Fengjuan Zhang; Jiawei Chen; Yongjin Wang; Haibo Zeng

    Light fidelity (LiFi), which is emerging as a compelling technology paradigm shifting the common means of high-capacity wireless communication technologies, requires wearable and full-duplex compact design because of its great significance in smart wearables as well as the ‘Internet of Things’. However, the construction of the key component of wearable full-duplex LiFi, light-emitting/detecting bifunctional

    更新日期:2020-09-16
  • Metastatic status of sentinel lymph nodes in breast cancer determined with photoacoustic microscopy via dual-targeting nanoparticles
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-16
    Yanfeng Dai; Xiang Yu; Jianshuang Wei; Fanxin Zeng; Yiran Li; Xiaoquan Yang; Qingming Luo; Zhihong Zhang

    Detection of sentinel lymph nodes (SLNs) is critical to guide the treatment of breast cancer. However, distinguishing metastatic SLNs from normal and inflamed lymph nodes (LNs) during surgical resection remains a challenge. Here, we report a CD44 and scavenger receptor class B1 dual-targeting hyaluronic acid nanoparticle (5K-HA-HPPS) loaded with the near-infra-red fluorescent dye DiR-BOA for SLN imaging

    更新日期:2020-09-16
  • Spectrum projection with a bandgap-gradient perovskite cell for colour perception
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-15
    Mei-Na Zhang; Xiaohan Wu; Antoine Riaud; Xiao-Lin Wang; Fengxian Xie; Wen-Jun Liu; Yongfeng Mei; David Wei Zhang; Shi-Jin Ding

    Optoelectronic devices for light or spectral signal detection are desired for use in a wide range of applications, including sensing, imaging, optical communications, and in situ characterization. However, existing photodetectors indicate only light intensities, whereas multiphotosensor spectrometers require at least a chip-level assembly and can generate redundant signals for applications that do

    更新日期:2020-09-15
  • Black phosphorus-based photothermal therapy with aCD47-mediated immune checkpoint blockade for enhanced cancer immunotherapy
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-15
    Zhongjian Xie; Minhua Peng; Ruitao Lu; Xiangying Meng; Weiyuan Liang; Zhongjun Li; Meng Qiu; Bin Zhang; Guohui Nie; Ni Xie; Han Zhang; Paras N. Prasad

    Here, we describe a combination strategy of black phosphorus (BP)-based photothermal therapy together with anti-CD47 antibody (aCD47)-based immunotherapy to synergistically enhance cancer treatment. Tumour resistance to immune checkpoint blockades in most cancers due to immune escape from host surveillance, along with the initiation of metastasis through immunosuppressive cells in the tumour microenvironment

    更新日期:2020-09-15
  • A versatile photodetector assisted by photovoltaic and bolometric effects.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-10
    Wei Jiang,Tan Zheng,Binmin Wu,Hanxue Jiao,Xudong Wang,Yan Chen,Xiaoyu Zhang,Meng Peng,Hailu Wang,Tie Lin,Hong Shen,Jun Ge,Weida Hu,Xiaofeng Xu,Xiangjian Meng,Junhao Chu,Jianlu Wang

    The advent of low-dimensional materials with peculiar structure and superb band properties provides a new canonical form for the development of photodetectors. However, the limited exploitation of basic properties makes it difficult for devices to stand out. Here, we demonstrate a hybrid heterostructure with ultrathin vanadium dioxide film and molybdenum ditelluride nanoflake. Vanadium dioxide is a

    更新日期:2020-09-10
  • Single-photon emission from isolated monolayer islands of InGaN.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-09
    Xiaoxiao Sun,Ping Wang,Tao Wang,Ling Chen,Zhaoying Chen,Kang Gao,Tomoyuki Aoki,Mo Li,Jian Zhang,Tobias Schulz,Martin Albrecht,Weikun Ge,Yasuhiko Arakawa,Bo Shen,Mark Holmes,Xinqiang Wang

    We identify and characterize a novel type of quantum emitter formed from InGaN monolayer islands grown using molecular beam epitaxy and further isolated via the fabrication of an array of nanopillar structures. Detailed optical analysis of the characteristic emission spectrum from the monolayer islands is performed, and the main transmission is shown to act as a bright, stable, and fast single-photon

    更新日期:2020-09-10
  • Tailoring the lineshapes of coupled plasmonic systems based on a theory derived from first principles.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-08
    Jing Lin,Meng Qiu,Xiyue Zhang,Huijie Guo,Qingnan Cai,Shiyi Xiao,Qiong He,Lei Zhou

    Coupled photonic systems exhibit intriguing optical responses attracting intensive attention, but available theoretical tools either cannot reveal the underlying physics or are empirical in nature. Here, we derive a rigorous theoretical framework from first principles (i.e., Maxwell’s equations), with all parameters directly computable via wave function integrations, to study coupled photonic systems

    更新日期:2020-09-08
  • Deep-blue organic light-emitting diodes based on a doublet d-f transition cerium(III) complex with 100% exciton utilization efficiency.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-08
    Liding Wang,Zifeng Zhao,Ge Zhan,Huayi Fang,Hannan Yang,Tianyu Huang,Yuewei Zhang,Nan Jiang,Lian Duan,Zhiwei Liu,Zuqiang Bian,Zhenghong Lu,Chunhui Huang

    Compared to red and green organic light-emitting diodes (OLEDs), blue OLEDs are still the bottleneck due to the lack of efficient emitters with simultaneous high exciton utilization efficiency (EUE) and short excited-state lifetime. Different from the fluorescence, phosphorescence, thermally activated delayed fluorescence (TADF), and organic radical materials traditionally used in OLEDs, we demonstrate

    更新日期:2020-09-08
  • Hybridisation of perovskite nanocrystals with organic molecules for highly efficient liquid scintillators.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-07
    Sangeun Cho,Sungwoo Kim,Jongmin Kim,Yongcheol Jo,Ilhwan Ryu,Seongsu Hong,Jae-Joon Lee,SeungNam Cha,Eun Bi Nam,Sang Uck Lee,Sam Kyu Noh,Hyungsang Kim,Jungwon Kwak,Hyunsik Im

    Compared with solid scintillators, liquid scintillators have limited capability in dosimetry and radiography due to their relatively low light yields. Here, we report a new generation of highly efficient and low-cost liquid scintillators constructed by surface hybridisation of colloidal metal halide perovskite CsPbA3 (A: Cl, Br, I) nanocrystals (NCs) with organic molecules (2,5-diphenyloxazole). The

    更新日期:2020-09-08
  • Light-emitting diodes: brighter NIR-emitting phosphor making light sources smarter.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-03
    Rong-Jun Xie

    A brighter near-infrared (NIR) phosphor is achieved by inhibiting the oxidation of Cr3+ and reducing the surface defects of phosphor particles, enabling the realization of smarter and more sensitive light sources for night vision.

    更新日期:2020-09-03
  • Hydrodynamical self-interference of a scattered polariton quanta.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-03
    Jiahui Huang,Wei Liu,Chee Wei Wong

    Researchers have observed the free-propagation of a single microcavity polariton directly and its self-interference when scattering upon a defect. These experimental observations of quantum hydrodynamics in the single polariton limit test the wave-particle duality and aid in the development of polariton-based photonic circuits in quantum information processing.

    更新日期:2020-09-03
  • One photon-per-bit receiver using near-noiseless phase-sensitive amplification.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-02
    Ravikiran Kakarla,Jochen Schröder,Peter A Andrekson

    Space communication for deep-space missions, inter-satellite data transfer and Earth monitoring requires high-speed data connectivity. The reach is fundamentally dictated by the available transmission power, the aperture size, and the receiver sensitivity. A transition from radio-frequency links to optical links is now seriously being considered, as this greatly reduces the channel loss caused by diffraction

    更新日期:2020-09-02
  • Electromagnetic chirality: from fundamentals to nontraditional chiroptical phenomena.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-09-02
    Jungho Mun,Minkyung Kim,Younghwan Yang,Trevon Badloe,Jincheng Ni,Yang Chen,Cheng-Wei Qiu,Junsuk Rho

    Chirality arises universally across many different fields. Recent advancements in artificial nanomaterials have demonstrated chiroptical responses that far exceed those found in natural materials. Chiroptical phenomena are complicated processes that involve transitions between states with opposite parities, and solid interpretations of these observations are yet to be clearly provided. In this review

    更新日期:2020-09-02
  • Multifocal structured illumination optoacoustic microscopy.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-31
    Zhenyue Chen,Ali Özbek,Johannes Rebling,Quanyu Zhou,Xosé Luís Deán-Ben,Daniel Razansky

    Optoacoustic (OA) imaging has the capacity to effectively bridge the gap between macroscopic and microscopic realms in biological imaging. High-resolution OA microscopy has so far been performed via point-by-point scanning with a focused laser beam, thus greatly restricting the achievable imaging speed and/or field of view. Herein we introduce multifocal structured illumination OA microscopy (MSIOAM)

    更新日期:2020-08-31
  • Artificial gauge field switching using orbital angular momentum modes in optical waveguides.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-28
    Christina Jörg,Gerard Queraltó,Mark Kremer,Gerard Pelegrí,Julian Schulz,Alexander Szameit,Georg von Freymann,Jordi Mompart,Verònica Ahufinger

    The discovery of artificial gauge fields controlling the dynamics of uncharged particles that otherwise elude the influence of standard electromagnetic fields has revolutionised the field of quantum simulation. Hence, developing new techniques to induce these fields is essential to boost quantum simulation of photonic structures. Here, we experimentally demonstrate the generation of an artificial gauge

    更新日期:2020-08-28
  • Tuneable red, green, and blue single-mode lasing in heterogeneously coupled organic spherical microcavities.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-28
    Yuxiang Du,Chang-Ling Zou,Chunhuan Zhang,Kang Wang,Chan Qiao,Jiannian Yao,Yong Sheng Zhao

    Tuneable microlasers that span the full visible spectrum, particularly red, green, and blue (RGB) colors, are of crucial importance for various optical devices. However, RGB microlasers usually operate in multimode because the mode selection strategy cannot be applied to the entire visible spectrum simultaneously, which has severely restricted their applications in on-chip optical processing and communication

    更新日期:2020-08-28
  • Harnessing a multi-dimensional fibre laser using genetic wavefront shaping.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-26
    Xiaoming Wei,Joseph C Jing,Yuecheng Shen,Lihong V Wang

    The multi-dimensional laser is a fascinating platform not only for the discovery and understanding of new higher-dimensional coherent lightwaves but also for the frontier study of the complex three-dimensional (3D) nonlinear dynamics and solitary waves widely involved in physics, chemistry, biology and materials science. Systemically controlling coherent lightwave oscillation in multi-dimensional lasers

    更新日期:2020-08-26
  • Routing valley exciton emission of a WS2 monolayer via delocalized Bloch modes of in-plane inversion-symmetry-broken photonic crystal slabs.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-21
    Jiajun Wang,Han Li,Yating Ma,Maoxiong Zhao,Wenzhe Liu,Bo Wang,Shiwei Wu,Xiaohan Liu,Lei Shi,Tian Jiang,Jian Zi

    The valleys of two-dimensional transition metal dichalcogenides (TMDCs) offer a new degree of freedom for information processing. To take advantage of this valley degree of freedom, on the one hand, it is feasible to control valleys by utilizing different external stimuli, such as optical and electric fields. On the other hand, nanostructures are also used to separate the valleys by near-field coupling

    更新日期:2020-08-21
  • Observation of supersymmetric pseudo-Landau levels in strained microwave graphene.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-19
    Matthieu Bellec,Charles Poli,Ulrich Kuhl,Fabrice Mortessagne,Henning Schomerus

    Using an array of coupled microwave resonators arranged in a deformed honeycomb lattice, we experimentally observe the formation of pseudo-Landau levels in the whole crossover from vanishing to large pseudomagnetic field strengths. This result is achieved by utilising an adaptable setup in a geometry that is compatible with the pseudo-Landau levels at all field strengths. The adopted approach enables

    更新日期:2020-08-19
  • Octupole corner state in a three-dimensional topological circuit.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-19
    Shuo Liu,Shaojie Ma,Qian Zhang,Lei Zhang,Cheng Yang,Oubo You,Wenlong Gao,Yuanjiang Xiang,Tie Jun Cui,Shuang Zhang

    Higher-order topological insulators (HOTIs) represent a new family of topological materials featuring quantized bulk polarizations and zero-dimensional corner states. In recent years, zero-dimensional corner states have been demonstrated in two-dimensional systems in the form of quadrupole modes or dipole modes. Due to the challenges in designing and constructing three-dimensional systems, octupole

    更新日期:2020-08-19
  • Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-19
    Omar Jamadi,Elena Rozas,Grazia Salerno,Marijana Milićević,Tomoki Ozawa,Isabelle Sagnes,Aristide Lemaître,Luc Le Gratiet,Abdelmounaim Harouri,Iacopo Carusotto,Jacqueline Bloch,Alberto Amo

    We report the realization of a synthetic magnetic field for photons and polaritons in a honeycomb lattice of coupled semiconductor micropillars. A strong synthetic field is induced in both the s and p orbital bands by engineering a uniaxial hopping gradient in the lattice, giving rise to the formation of Landau levels at the Dirac points. We provide direct evidence of the sublattice symmetry breaking

    更新日期:2020-08-19
  • Lensless light-field imaging through diffuser encoding.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-19
    Zewei Cai,Jiawei Chen,Giancarlo Pedrini,Wolfgang Osten,Xiaoli Liu,Xiang Peng

    Microlens array-based light-field imaging has been one of the most commonly used and effective technologies to record high-dimensional optical signals for developing various potential high-performance applications in many fields. However, the use of a microlens array generally suffers from an intrinsic trade-off between the spatial and angular resolutions. In this paper, we concentrate on exploiting

    更新日期:2020-08-19
  • Nontrivial coupling of light into a defect: the interplay of nonlinearity and topology.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-19
    Shiqi Xia,Dario Jukić,Nan Wang,Daria Smirnova,Lev Smirnov,Liqin Tang,Daohong Song,Alexander Szameit,Daniel Leykam,Jingjun Xu,Zhigang Chen,Hrvoje Buljan

    The flourishing of topological photonics in the last decade was achieved mainly due to developments in linear topological photonic structures. However, when nonlinearity is introduced, many intriguing questions arise. For example, are there universal fingerprints of the underlying topology when modes are coupled by nonlinearity, and what can happen to topological invariants during nonlinear propagation

    更新日期:2020-08-19
  • Wolf phase tomography (WPT) of transparent structures using partially coherent illumination.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-19
    Xi Chen,Mikhail E Kandel,Chenfei Hu,Young Jae Lee,Gabriel Popescu

    In 1969, Emil Wolf proposed diffraction tomography using coherent holographic imaging to extract 3D information from transparent, inhomogeneous objects. In the same era, the Wolf equations were first used to describe the propagation correlations associated with partially coherent fields. Combining these two concepts, we present Wolf phase tomography (WPT), which is a method for performing diffraction

    更新日期:2020-08-19
  • Dynamic full-field optical coherence tomography: 3D live-imaging of retinal organoids.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-17
    Jules Scholler,Kassandra Groux,Olivier Goureau,José-Alain Sahel,Mathias Fink,Sacha Reichman,Claude Boccara,Kate Grieve

    Optical coherence tomography offers astounding opportunities to image the complex structure of living tissue but lacks functional information. We present dynamic full-field optical coherence tomography as a technique to noninvasively image living human induced pluripotent stem cell-derived retinal organoids. Coloured images with an endogenous contrast linked to organelle motility are generated, with

    更新日期:2020-08-17
  • Opto-thermoelectric microswimmers.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-17
    Xiaolei Peng,Zhihan Chen,Pavana Siddhartha Kollipara,Yaoran Liu,Jie Fang,Linhan Lin,Yuebing Zheng

    Inspired by the “run-and-tumble” behaviours of Escherichia coli (E. coli) cells, we develop opto-thermoelectric microswimmers. The microswimmers are based on dielectric-Au Janus particles driven by a self-sustained electrical field that arises from the asymmetric optothermal response of the particles. Upon illumination by a defocused laser beam, the Janus particles exhibit an optically generated temperature

    更新日期:2020-08-17
  • Controllable broadband multicolour single-mode polarized laser in a dye-assembled homoepitaxial MOF microcrystal.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-13
    Huajun He,Yuanjing Cui,Hongjun Li,Kai Shao,Banglin Chen,Guodong Qian

    Multicolour single-mode polarized microlasers with visible to near-infrared output have very important applications in photonic integration and multimodal biochemical sensing/imaging but are very difficult to realize. Here, we demonstrate a single crystal with multiple segments based on the host-guest metal-organic framework ZJU-68 hierarchically hybridized with different dye molecules generating controllable

    更新日期:2020-08-14
  • Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-11
    Han Lin,Zai-Quan Xu,Guiyuan Cao,Yupeng Zhang,Jiadong Zhou,Ziyu Wang,Zhichen Wan,Zheng Liu,Kian Ping Loh,Cheng-Wei Qiu,Qiaoliang Bao,Baohua Jia

    Ultrathin flat optics allow control of light at the subwavelength scale that is unmatched by traditional refractive optics. To approach the atomically thin limit, the use of 2D materials is an attractive possibility due to their high refractive indices. However, achievement of diffraction-limited focusing and imaging is challenged by their thickness-limited spatial resolution and focusing efficiency

    更新日期:2020-08-11
  • Ultrafast hydrogen bond dynamics of liquid water revealed by terahertz-induced transient birefringence.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-08-04
    Hang Zhao,Yong Tan,Liangliang Zhang,Rui Zhang,Mostafa Shalaby,Cunlin Zhang,Yuejin Zhao,Xi-Cheng Zhang

    The fundamental properties of water molecules, such as their molecular polarizability, have not yet been clarified. The hydrogen bond network is generally considered to play an important role in the thermodynamic properties of water. The terahertz (THz) Kerr effect technique, as a novel tool, is expected to be useful in exploring the low-frequency molecular dynamics of liquid water. Here, we use an

    更新日期:2020-08-04
  • Multifocal photoacoustic microscopy using a single-element ultrasonic transducer through an ergodic relay.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-31
    Yang Li,Terence T W Wong,Junhui Shi,Hsun-Chia Hsu,Lihong V Wang

    Optical-resolution photoacoustic microscopy (OR-PAM) has demonstrated high-spatial-resolution imaging of optical absorption in biological tissue. To date, most OR-PAM systems rely on mechanical scanning with confocally aligned optical excitation and ultrasonic detection, limiting the wide-field imaging speed of these systems. Although several multifocal OR-PA (MFOR-PA) systems have attempted to address

    更新日期:2020-07-31
  • Polarization-controlled optical holography using flat optics.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-29
    Arka Majumdar,Shane Colburn

    Due to the large number of degrees of freedom offered by nanoscale scatterers, a single flat optic can project different images at different distances depending on the polarization of the light, opening up opportunities for optical encryption and augmented reality systems.

    更新日期:2020-07-29
  • Photonic amorphous topological insulator.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-24
    Peiheng Zhou,Gui-Geng Liu,Xin Ren,Yihao Yang,Haoran Xue,Lei Bi,Longjiang Deng,Yidong Chong,Baile Zhang

    The current understanding of topological insulators and their classical wave analogs, such as photonic topological insulators, is mainly based on topological band theory. However, standard band theory does not apply to amorphous phases of matter, which are formed by non-crystalline lattices with no long-range positional order but only short-range order, exhibiting unique phenomena such as the glass-to-liquid

    更新日期:2020-07-24
  • Photonic Floquet topological insulators in a fractal lattice.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    Zhaoju Yang,Eran Lustig,Yaakov Lumer,Mordechai Segev

    We present Floquet fractal topological insulators: photonic topological insulators in a fractal-dimensional lattice consisting of helical waveguides. The helical modulation induces an artificial gauge field and leads to a trivial-to-topological phase transition. The quasi-energy spectrum shows the existence of topological edge states corresponding to real-space Chern number 1. We study the propagation

    更新日期:2020-07-20
  • Temporal aiming.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    Victor Pacheco-Peña,Nader Engheta

    Deflecting and changing the direction of propagation of electromagnetic waves are needed in multiple applications, such as in lens–antenna systems, point-to-point communications and radars. In this realm, metamaterials have been demonstrated to be great candidates for controlling wave propagation and wave–matter interactions by offering manipulation of their electromagnetic properties at will. They

    更新日期:2020-07-20
  • Ultrathin monolithic 3D printed optical coherence tomography endoscopy for preclinical and clinical use.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    Jiawen Li,Simon Thiele,Bryden C Quirk,Rodney W Kirk,Johan W Verjans,Emma Akers,Christina A Bursill,Stephen J Nicholls,Alois M Herkommer,Harald Giessen,Robert A McLaughlin

    Preclinical and clinical diagnostics increasingly rely on techniques to visualize internal organs at high resolution via endoscopes. Miniaturized endoscopic probes are necessary for imaging small luminal or delicate organs without causing trauma to tissue. However, current fabrication methods limit the imaging performance of highly miniaturized probes, restricting their widespread application. To overcome

    更新日期:2020-07-20
  • Recent advances in 2D, 3D and higher-order topological photonics.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    Minkyung Kim,Zubin Jacob,Junsuk Rho

    Over the past decade, topology has emerged as a major branch in broad areas of physics, from atomic lattices to condensed matter. In particular, topology has received significant attention in photonics because light waves can serve as a platform to investigate nontrivial bulk and edge physics with the aid of carefully engineered photonic crystals and metamaterials. Simultaneously, photonics provides

    更新日期:2020-07-20
  • Enhancing the graphene photocurrent using surface plasmons and a p-n junction.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    Di Wang,Andres E Llacsahuanga Allcca,Ting-Fung Chung,Alexander V Kildishev,Yong P Chen,Alexandra Boltasseva,Vladimir M Shalaev

    The recently proposed concept of graphene photodetectors offers remarkable properties such as unprecedented compactness, ultrabroadband detection, and an ultrafast response speed. However, owing to the low optical absorption of pristine monolayer graphene, the intrinsically low responsivity of graphene photodetectors significantly hinders the development of practical devices. To address this issue

    更新日期:2020-07-20
  • Multidimensional synthetic chiral-tube lattices via nonlinear frequency conversion.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    Kai Wang,Bryn A Bell,Alexander S Solntsev,Dragomir N Neshev,Benjamin J Eggleton,Andrey A Sukhorukov

    Geometrical dimensionality plays a fundamentally important role in the topological effects arising in discrete lattices. Although direct experiments are limited by three spatial dimensions, the research topic of synthetic dimensions implemented by the frequency degree of freedom in photonics is rapidly advancing. The manipulation of light in these artificial lattices is typically realized through electro-optic

    更新日期:2020-07-20
  • Infrared chemical imaging through non-degenerate two-photon absorption in silicon-based cameras.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    David Knez,Adam M Hanninen,Richard C Prince,Eric O Potma,Dmitry A Fishman

    Chemical imaging based on mid-infrared (MIR) spectroscopic contrast is an important technique with a myriad of applications, including biomedical imaging and environmental monitoring. Current MIR cameras, however, lack performance and are much less affordable than mature Si-based devices, which operate in the visible and near-infrared regions. Here, we demonstrate fast MIR chemical imaging through

    更新日期:2020-07-20
  • Room-temperature lasing from nanophotonic topological cavities.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    Daria Smirnova,Aditya Tripathi,Sergey Kruk,Min-Soo Hwang,Ha-Reem Kim,Hong-Gyu Park,Yuri Kivshar

    The study of topological phases of light underpins a promising paradigm for engineering disorder-immune compact photonic devices with unusual properties. Combined with an optical gain, topological photonic structures provide a novel platform for micro- and nanoscale lasers, which could benefit from nontrivial band topology and spatially localized gap states. Here, we propose and demonstrate experimentally

    更新日期:2020-07-20
  • Higher-order topological insulators in synthetic dimensions.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-20
    Avik Dutt,Momchil Minkov,Ian A D Williamson,Shanhui Fan

    Conventional topological insulators support boundary states with dimension one lower than that of the bulk system that hosts them, and these states are topologically protected due to quantized bulk dipole moments. Recently, higher-order topological insulators have been proposed as a way of realizing topological states with dimensions two or more lower than that of the bulk due to the quantization of

    更新日期:2020-07-20
  • Nonlinear interferometers with correlated photons: toward spectroscopy and imaging with quantum light.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-17
    Konstantin E Dorfman

    A nonlinear optical interferometer based on crystal superlattices has been demonstrated for the first time in a cascade of up to five crystals. The enhanced sensitivity due to quantum interference and correlations makes it a promising tool for sensing, imaging, and spectroscopy.

    更新日期:2020-07-17
  • Nanoparticle meta-grid for enhanced light extraction from light-emitting devices.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-16
    Debabrata Sikdar,John B Pendry,Alexei A Kornyshev

    Based on a developed theory, we show that introducing a meta-grid of sub-wavelength-sized plasmonic nanoparticles (NPs) into existing semiconductor light-emitting-devices (LEDs) can lead to enhanced transmission of light across the LED-chip/encapsulant interface. This results from destructive interference between light reflected from the chip/encapsulant interface and light reflected by the NP meta-grid

    更新日期:2020-07-16
  • Giant photothermoelectric effect in silicon nanoribbon photodetectors.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-14
    Wei Dai,Weikang Liu,Jian Yang,Chao Xu,Alessandro Alabastri,Chang Liu,Peter Nordlander,Zhiqiang Guan,Hongxing Xu

    The photothermoelectric (PTE) effect enables efficient harvesting of the energy of photogenerated hot carriers and is a promising choice for high-efficiency photoelectric energy conversion and photodetection. Recently, the PTE effect was reported in low-dimensional nanomaterials, suggesting the possibility of optimizing their energy conversion efficiency. Unfortunately, the PTE effect becomes extremely

    更新日期:2020-07-14
  • Transparent inorganic multicolour displays enabled by zinc-based electrochromic devices.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-14
    Wu Zhang,Haizeng Li,William W Yu,Abdulhakem Y Elezzabi

    Electrochromic displays have been the subject of extensive research as a promising colour display technology. The current state-of-the-art inorganic multicolour electrochromic displays utilize nanocavity structures that sacrifice transparency and thus limit their diverse applications. Herein, we demonstrate a transparent inorganic multicolour display platform based on Zn-based electrochromic devices

    更新日期:2020-07-14
  • Efficient full-path optical calculation of scalar and vector diffraction using the Bluestein method.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-13
    Yanlei Hu,Zhongyu Wang,Xuewen Wang,Shengyun Ji,Chenchu Zhang,Jiawen Li,Wulin Zhu,Dong Wu,Jiaru Chu

    Efficient calculation of the light diffraction in free space is of great significance for tracing electromagnetic field propagation and predicting the performance of optical systems such as microscopy, photolithography, and manipulation. However, existing calculation methods suffer from low computational efficiency and poor flexibility. Here, we present a fast and flexible calculation method for computing

    更新日期:2020-07-13
  • Monitoring the charge-transfer process in a Nd-doped semiconductor based on photoluminescence and SERS technology.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-10
    Shuo Yang,Jiacheng Yao,Yingnan Quan,Mingyue Hu,Rui Su,Ming Gao,Donglai Han,Jinghai Yang

    Surface-enhanced Raman scattering (SERS) and photoluminescence (PL) are important photoexcitation spectroscopy techniques; however, understanding how to analyze and modulate the relationship between SERS and PL is rather important for enhancing SERS, having a great effect on practical applications. In this work, a charge-transfer (CT) mechanism is proposed to investigate the change and relationships

    更新日期:2020-07-10
  • Early detection and classification of live bacteria using time-lapse coherent imaging and deep learning.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-10
    Hongda Wang,Hatice Ceylan Koydemir,Yunzhe Qiu,Bijie Bai,Yibo Zhang,Yiyin Jin,Sabiha Tok,Enis Cagatay Yilmaz,Esin Gumustekin,Yair Rivenson,Aydogan Ozcan

    Early identification of pathogenic bacteria in food, water, and bodily fluids is very important and yet challenging, owing to sample complexities and large sample volumes that need to be rapidly screened. Existing screening methods based on plate counting or molecular analysis present various tradeoffs with regard to the detection time, accuracy/sensitivity, cost, and sample preparation complexity

    更新日期:2020-07-10
  • Supertransport of excitons in atomically thin organic semiconductors at the 2D quantum limit.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-06
    Ankur Sharma,Linglong Zhang,Jonathan O Tollerud,Miheng Dong,Yi Zhu,Robert Halbich,Tobias Vogl,Kun Liang,Hieu T Nguyen,Fan Wang,Shilpa Sanwlani,Stuart K Earl,Daniel Macdonald,Ping Koy Lam,Jeffrey A Davis,Yuerui Lu

    Long-range and fast transport of coherent excitons is important for the development of high-speed excitonic circuits and quantum computing applications. However, most of these coherent excitons have only been observed in some low-dimensional semiconductors when coupled with cavities, as there are large inhomogeneous broadening and dephasing effects on the transport of excitons in their native states

    更新日期:2020-07-06
  • On-chip optical vortex-based nanophotonic detectors.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-03
    Alina Karabchevsky

    An on-chip optical vortex detector based on spin-Hall nanoslits is reported. The detector is sensitive to the spin of the incoming beam and can simultaneously record the polarization and phase singularity. Although the reported device relies on fast decaying surface plasmons, it represents an important step forward in the development of optical vortex-based integrated photonic devices.

    更新日期:2020-07-03
  • Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-02
    Xinrong Zong,Huamin Hu,Gang Ouyang,Jingwei Wang,Run Shi,Le Zhang,Qingsheng Zeng,Chao Zhu,Shouheng Chen,Chun Cheng,Bing Wang,Han Zhang,Zheng Liu,Wei Huang,Taihong Wang,Lin Wang,Xiaolong Chen

    Mid-infrared (MIR) light-emitting devices play a key role in optical communications, thermal imaging, and material analysis applications. Two-dimensional (2D) materials offer a promising direction for next-generation MIR devices owing to their exotic optical properties, as well as the ultimate thickness limit. More importantly, van der Waals heterostructures—combining the best of various 2D materials

    更新日期:2020-07-02
  • A plasmonic route for the integrated wireless communication of subdiffraction-limited signals.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-07-02
    Hao Chi Zhang,Le Peng Zhang,Pei Hang He,Jie Xu,Cheng Qian,Francisco J Garcia-Vidal,Tie Jun Cui

    Perfect lenses, superlenses and time-reversal mirrors can support and spatially separate evanescent waves, which is the basis for detecting subwavelength information in the far field. However, the inherent limitations of these methods have prevented the development of systems to dynamically distinguish subdiffraction-limited signals. Utilizing the physical merits of spoof surface plasmon polaritons

    更新日期:2020-07-02
  • Dynamic conjugate F-SHARP microscopy.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-06-30
    Ioannis N Papadopoulos,Jean-Sebastien Jouhanneau,Naoya Takahashi,David Kaplan,Matthew Larkum,James Poulet,Benjamin Judkewitz

    Optical microscopy is an indispensable tool in biomedical sciences, but its reach in deep tissues is limited due to aberrations and scattering. This problem can be overcome by wavefront-shaping techniques, albeit at limited fields of view (FOVs). Inspired by astronomical imaging, conjugate wavefront shaping can lead to an increased field of view in microscopy, but this correction is limited to a set

    更新日期:2020-06-30
  • Low-dose real-time X-ray imaging with nontoxic double perovskite scintillators.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-06-30
    Wenjuan Zhu,Wenbo Ma,Yirong Su,Zeng Chen,Xinya Chen,Yaoguang Ma,Lizhong Bai,Wenge Xiao,Tianyu Liu,Haiming Zhu,Xiaofeng Liu,Huafeng Liu,Xu Liu,Yang Michael Yang

    X-rays are widely used in probing inside information nondestructively, enabling broad applications in the medical radiography and electronic industries. X-ray imaging based on emerging lead halide perovskite scintillators has received extensive attention recently. However, the strong self-absorption, relatively low light yield and lead toxicity of these perovskites restrict their practical applications

    更新日期:2020-06-30
  • Modulating the optical and electrical properties of MAPbBr3 single crystals via voltage regulation engineering and application in memristors.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-06-30
    Jun Xing,Chen Zhao,Yuting Zou,Wenchi Kong,Zhi Yu,Yuwei Shan,Qingfeng Dong,Ding Zhou,Weili Yu,Chunlei Guo

    Defect density is one of the most significant characteristics of perovskite single crystals (PSCs) that determines their optical and electrical properties, but few strategies are available to tune this property. Here, we demonstrate that voltage regulation is an efficient method to tune defect density, as well as the optical and electrical properties of PSCs. A three-step carrier transport model of

    更新日期:2020-06-30
  • Low-threshold topological nanolasers based on the second-order corner state.
    Light Sci. Appl. (IF 13.714) Pub Date : 2020-06-29
    Weixuan Zhang,Xin Xie,Huiming Hao,Jianchen Dang,Shan Xiao,Shushu Shi,Haiqiao Ni,Zhichuan Niu,Can Wang,Kuijuan Jin,Xiangdong Zhang,Xiulai Xu

    Topological lasers are immune to imperfections and disorder. They have been recently demonstrated based on many kinds of robust edge states, which are mostly at the microscale. The realization of 2D on-chip topological nanolasers with a small footprint, a low threshold and high energy efficiency has yet to be explored. Here, we report the first experimental demonstration of a topological nanolaser

    更新日期:2020-06-29
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