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Plasmonically enhanced solar-blind self-powered photodetector array utilizing Pt nanoparticles-modified Ga2O3 nanorod heterojunction

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photonics Research 2025年第01期13卷 140-149页

作者： QINZHI ZHAO LINGFENG MAO PENG WAN LIJIAN LI KAI TANG CAIXIA KAN DANING SHI XIAOXUAN WANG MINGMING JIANG College of Physics MIIT Key Laboratory of Aerospace Information Materials and Physics Key Laboratory for Intelligent Nano Materials and Devices Nanjing University of Aeronautics and Astronautics State Key Laboratory of Digital Medical Engineering School of Electronic Science & Engineering Southeast University

Low-dimensional Ga2O3monocrystalline micro/nanostructures show promising application prospects in largearea arrays, integrated circuits, and flexible optoelectronic devices, owing to their exceptional optoelectronic performance and scalability for mass production. Herein, we developed an 8 × 8 array of high-performance solar-blind ultraviolet photodetectors based on Pt nanoparticles-modified Ga2O3（PtNPs@Ga2O3） nanorod film heterojunction with p-GaN substrate serving as the hole transporting layer. The PtNPs@Ga2O3∕Ga N heterojunction detector units exhibit outstanding photovoltaic performance at 0 V bias, demonstrating high responsivity（189.0 m A/W）, specific detectivity(4.0 × 1012Jones), external quantum efficiency（92.4%）, and swift response time（674/692 μs） under an irradiance of 1 μW∕cm2at 254 nm. Their exceptional performance stands out among competitors of the same type. In addition, the detector array demonstrated satisfactory results in a conceptual demonstration of high-resolution imaging, benefiting from the excellent stability and uniformity exhibited by its array units. These findings provide a straightforward and viable method for developing a high-performance solar-blind ultraviolet detector array based on low-dimensional Ga2O3nanorod monocrystalline, demonstrating their potential advancement in large-area, integrable, and flexible optoelectronic devices.

关键词： Detector arrays Image sensors Nanostructures Photodetectors Quantum efficiency Scanning electron microscopy

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Tailoring Light–Matter Interactions in Overcoupled Resonator for Biomolecule Recognition and Detection

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Nano-Micro Letters 2025年第1期17卷 262-280页

作者： Dongxiao Li Hong Zhou Zhihao Ren Cheng Xu Chengkuo Lee Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

Plasmonic nanoantennas provide unique opportunities for precise control of light–matter coupling in surface-enhanced infrared absorption(SEIRA)spectroscopy,but most of the resonant systems realized so far suffer from the obstacles of low sensitivity,narrow bandwidth,and asymmetric Fano resonance ***,we demonstrated an overcoupled resonator with a high plasmon-molecule coupling coefficient(μ)(OC-Hμresonator)by precisely controlling the radiation loss channel,the resonator-oscillator coupling channel,and the frequency detuning *** observed a strong dependence of the sensing performance on the coupling state,and demonstrated that OC-Hμresonator has excellent sensing properties of ultra-sensitive(7.25%nm^(−1)),ultra-broadband(3–10μm),and immune asymmetric Fano *** characteristics represent a breakthrough in SEIRA technology and lay the foundation for specific recognition of biomolecules,trace detection,and protein secondary structure analysis using a single array(array size is 100×100μm^(2)).In addition,with the assistance of machine learning,mixture classification,concentration prediction and spectral reconstruction were achieved with the highest accuracy of 100%.Finally,we demonstrated the potential of OC-Hμresonator for SARS-CoV-2 *** findings will promote the wider application of SEIRA technology,while providing new ideas for other enhanced spectroscopy technologies,quantum photonics and studying light–matter interactions.

关键词： Plasmonic nanoantennas Light-matter interaction Surface-enhanced infrared absorption Overcoupled Biosensing

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Heterogeneously integrated silicon-conductive oxide MOSCAP microring modulator array

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photonics Research 2025年第1期13卷 187-193页

作者： WEI-CHE HSU SAEED ABDOLHOSSEINI HAISHENG RONG RANJEET KUMAR BERND ZECHMANN ALAN X.WANG Department of Electrical and Computer Engineering Baylor University School of Electrical Engineering and Computer Science Oregon State University Intel Corporation Center of Microscopy and Imaging Baylor University

In pursuit of energy-efficient optical interconnect, the silicon microring modulator（Si-MRM） has emerged as a pivotal device offering an ultra-compact footprint and capability of on-chip wavelength division multiplexing（WDM）. This paper presents a 1 × 4 metal-oxide-semiconductor capacitor（MOSCAP） Si-MRM array gated by high-mobility titanium-doped indium oxide（ITi O）, which was fabricated by combining Intel's high-volume manufacturing process and the transparent conductive oxide（TCO） patterning with the university facility. The 1 × 4 Si-MRM array exhibits a high electro-optic（E-O） efficiency with Vπ· L of 0.12 V · cm and achieves a modulation rate of（3 × 25 + 1 × 15） Gb/s with a measured bandwidth of 14 GHz. Additionally, it can perform on-chip WDM modulation at four equally spaced wavelengths without using thermal heaters. The process compatibility between silicon photonics and TCO materials is verified by such an industry-university co-fabrication approach for the MOSCAP Si-MRM array and demonstrated enhanced performance from heterogeneous integration.

关键词： Modulation Optical interconnects Optical signals Silicon modulators Silicon photonics Wavelength division multiplexing

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Quantum photonics: feature introduction

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photonics Research 2019年第12期7卷 I0001-I0002页

作者： XIAN-MIN JIN M.S.KIM BRIAN J.SMITH School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China QOLS Blackett LaboratoryImperial College LondonLondon SW72AZUK Department of Physics and Oregon Center for Optical Molecularand Quantum ScienceUniversity of OregonEugeneOregon 97403USA

Photons,the individual quanta of the light field,are what the science of quantum photonics is dedicatedly *** manipulation and coherent control of photons in quantum photonics enables the exploration of various quantum phenomena of high fundamental *** the meantime,due to the fast speed and a lack of the interaction with the environment,photons are now regarded as a promising platform for the emerging quantum information processing(QIP)***,there is a growing number of works on quantum computing,quantum communication,and quantum metrology that are solidly based on the techniques of quantum photonics.

关键词： quantum coherent enable

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Dynamic generation of multiplexed vortex beams by a space-time-coding metasurface

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photonics Research 2025年第1期13卷 225-234页

作者： PENGCHENG TANG LIMING SI QIANQIAN YUAN JIE TIAN JIAXUAN DENG TIANYU MA XIUE BAO CHONG HE WEIREN ZHU Beijing Key Laboratory of Millimeter Wave and Terahertz Technology School of Integrated Circuits and ElectronicsBeijing Institute of Technology Department of Electronic Engineering Shanghai Jiao Tong University

Dynamic generation of multimode vortex waves carrying orbital angular momentum (OAM) utilizing programmable metasurfaces has attracted considerable attention. Yet, it is still a challenge to achieve multiplexed vortex waves with an arbitrary customized mode combination, stemming fundamentally from the discrete control over phase exhibited by current programmable metasurfaces, which are typically constrained to a limited 1-bit or 2-bit discrete resolution.

关键词： Field programmable gate arrays Indium tin oxide Millimeter waves Phase modulation Space division multiplexing Spiral phase

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World photonics Conference 2025 14th Applied Optics and photonics China(AOPC 2025)

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红外与激光工程 2025年第2期54卷 I0006-I0006页

https:/***/meeting/***主办单位:中国光学工程学会(CSOE)、国际光学工程学会(SPIE)、美国工程院、德国工程院、俄罗斯工程院、瑞典皇家工程院、新加坡工程院、美国麻省理工学院、德国夫琅禾费研究所、韩国光学学会(OSK)、日本应用物理... 详细信息

https:/***/meeting/***主办单位:中国光学工程学会(CSOE)、国际光学工程学会(SPIE)、美国工程院、德国工程院、俄罗斯工程院、瑞典皇家工程院、新加坡工程院、美国麻省理工学院、德国夫琅禾费研究所、韩国光学学会(OSK)、日本应用物理学会(JSAP)、新加坡光学学会(OPSS)承办单位:中国光学工程学会(CSOE).

关键词：光学学会应用物理学光学工程 SPIE 美国工程院

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Freestanding metamaterial with constant coupling response for terahertz flexible functional devices

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photonics Research 2025年第1期13卷 177-186页

作者： QIUMING ZENG TINGTING SHI YI HUANG SHUNCONG ZHONG FUWEI SUN CHENGLONG GUAN JIANXIONG CHEN TINGLING LIN YUJIE ZHONG YONGLIN HUANG Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing School of Mechanical Engineering and AutomationFuzhou University Institute of Precision Instrument and Intelligent Measurement & Control Fuzhou University School of Economics and Management Minjiang University

Metamaterials(MMs) have become increasingly prominent in terahertz flexible devices. However, bending deformation often alters the structure of the unit, which affects the response performance and stability of ***, a metal-aperture metamaterial(MA-MM) utilizing the strong coupling effect induced by two resonance modes is innovatively proposed to address the mentioned limitations. Specifically, it is found that the coupling state between multiple resonance modes remains consistent at different bending angles. Under these circumstances, the generated Rabi splitting peak presents stable response performance even under low resonance intensity caused by excessive deformation. The experimental results demonstrate that despite the amplitude of two resonant peaks decreasing significantly by 87.6%, the Q-factor of the Rabi splitting only reduced by 14.8%. Furthermore,armed with the response mode of the Rabi splitting being unaffected by plasma excitation range, the designed MA-MMs are able to maintain constant Q-factors and frequencies on curved surfaces of varying *** findings exhibit the characteristics of electromagnetic response for multi-mode resonance-coupled MAMMs on different curved surfaces, presenting a novel design approach for terahertz flexible functional devices.

关键词： Femtosecond lasers Light matter interactions Negative refraction Polymers Resonant modes Thin films

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Dual-function switchable terahertz surface plasmon device driven by a GST metasurface

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photonics Research 2025年第1期13卷 98-105页

作者： G1UANGHONG XU QUAN LI HAO SU YISHENG DONG GUANXUAN GUO HUIRONG WANG HAI HUANG TAI CHEN SHUANG WANG XUEQIAN ZHANG ZHEN TIAN School of Electronic Engineering Tianjin University of Technology and Education Center for Terahertz Waves College of Precision Instrument and Optoelectronics Engineering and Key Laboratory of Optoelectronics Information and Technology (Ministry of Education) Tianjin University

Surface plasmons （SPs） are one of the most effective information carriers for on-chip systems due to their twodimensional propagation *** from the highly flexible designability,metasuraces have emerged as a promising route in realizing SP ***,related studies are mainly focused on passive ***,by introducing nonvolatile phase-change material Ge2Sb2Te5（GST） into the metasurface design,we experimentally demonstrate a dual-function switchable SP device in the terahertz ***,the device works as a spin-dependent directional plane-wave SP coupler when GST is in the amorphous state,while it works as a spin-dependent directional SP Fresnel zone plate （FZP） when GST is in the crystalline *** states of GST are switched back and forth using thermal excitation and nanosecond laser illumination,*** method is simple and robust,and can find broad applications in on-chip photonic devices.?2024Chinese Laser Press

关键词： Light transmission Liquid crystals Optical properties Photonic devices Surface plasmons Zone plates

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Realization of edge states along a synthetic orbital angular momentum dimension

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photonics Research 2025年第1期13卷 87-97页

作者： YU-WEI LIAO MU YANG HAO-QING ZHANG ZHI-HE HAO JUN HU TIAN-XIANG ZHU ZONG-QUAN ZHOU XI-WANG LUO JIN-SHI XU CHUAN-FENG LI GUANG-CAN GUO CAS Key Laboratory of Quantum Information University of Science and Technology of China Anhui Province Key Laboratory of Quantum Network University of Science and Technology of China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Hefei National Laboratory University of Science and Technology of China

Synthetic dimensions have emerged as promising methodologies for studying topological physics, offering great advantages in controllability and flexibility. Photonic orbital angular momentum(OAM), characterized by discrete yet unbounded properties, serves as a potent carrier for constructing synthetic dimensions. Despite the widespread utilization of synthetic OAM dimensions in the investigation of topological physics, the demonstration of an edge along such dimensions has remained challenging, significantly constraining the exploration of important topological edge effects. In this study, we establish an edge within a Floquet Su–Schrieffer–Heeger OAM lattice, creating approximate semi-infinite lattices by introducing a pinhole in the optical elements within a cavity. Leveraging the spectral detection capabilities of the cavity, we directly measure the phase transitions of zero(±π) energy edge states, elucidating the principle of bulk-edge correspondence. Furthermore, we dynamically observe the migration of edge modes from the gap to the bulk by varying the edge phase, and we reveal that interference near the surface results in the discretization of the spectrum. We offer, to our knowledge,a novel perspective for investigating edge effects and provide an important photonic toolbox in topological photonics.

关键词： Beam splitters Information processing Optical elements Orbital angular momentum multiplexing photonics Quantum information

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High spectral-efficiency, ultra-low MIMO SDM transmission over a field-deployed multi-core OAM fiber

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photonics Research 2025年第1期13卷 18-30页

作者： JUNYI LIU SHUQIN MO ZENGQUAN XU YUMING HUANG YINING HUANG ZHENHUA LI YUYING GUO LEI SHEN SHUO XU RAN GAO CHENG DU QIAN FENG JIE LUO JIE LIU SIYUAN YU State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen University Yangtze Optical Fibre and Cable Joint Stock Limited Company State Key Laboratory of Optical Fibre and Cable Manufacture Technology School of Information and Electronics Beijing Institute of Technology Fiberhome Telecommunication Technologies Co. Ltd. School of Electronics and Information Technology and Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen University

Space-division multiplexing (SDM) systems based on few-mode multi-core fibers (FM-MCFs) utilize both spatial channels (fiber cores) and modes (optical modes per core) to maximize transmission *** laboratory FM-MCFs or field-deployed single-mode multi-core fibers (SM-MCFs),SDM transmissions over field-deployed FM-MCFs in outdoor settings have not been ***,concerns remain that environmental interference and cabling stress could worsen inter-core and intra-core modal crosstalk and impact the performance of SDM systems over *** this paper,we demonstrate successful bidirectional SDM transmission over a5-km,field-deployed seven ring-core fiber (7-RCF) with a cladding diameter of 178μ*** measurements show no significant differences in attenuation and mode coupling compared to pre-cabling conditions,confirming the fiber’s resilience to environmental disturbances and adaptability to cable *** the field-deployed7-RCF,bi-directional SDM transmission is implemented,achieving spectral efficiency (SE) of 2×201.6 bit/(s Hz)which sets a new record in field-deployed fiber cables that is a tenfold increase over previous ***,these results were achieved using a small-scale 4×4 multiple-input multiple-output (MIMO)scheme with a time-domain equalization (TDE) tap number not exceeding *** results demonstrate the substantial potential of using SDM techniques to significantly enhance SE and expand capacity in practical fiber-optic transmission applications.

关键词： Effective refractive index Few mode fibers Mode division multiplexing Multicore fibers Signal processing Space division multiplexing

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