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2022 Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022

作者： Wang, Zongyang Yang, Jin Xu, Wei Zhu, Zhihong Qin, Shiqiao Zhang, Jianfa College of Advanced Interdisciplinary Studies National University of Defense Technology Changsha410073 China Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices National University of Defense Technology Changsha410073 China

ISBN: (纸本)9781510662476

As a typical two-dimensional material, ever since the first exfoliation of graphene in 2004, many studies have been carried out around its unique mechanical, optical and electrical properties. Due to its unique lattice structure, it exhibits extremely high carrier mobility and excellent thermal conductivity, showing high stability at high temperatures. This makes graphene a promising material for thermal applications. In the past few years, Joule heating of micro scale graphene for thermal infrared emission and broadband light sources has attracted significant attentions. However, the potential of large area and array of graphene in thermal infrared applications has rarely been explored. Here we experimentally demonstrate infrared display with centimeter scale graphene film array. © 2023 SPIE.

关键词： Graphene

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Self-Powered Photodetector with High Performance Based on PtSe2/MoSe2 Van der Waals Heterojunction

Self-Powered Photodetector with High Performance Based on Pt...

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2023 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display technology and Applications;and Biomedical Optics, AOPC 2023

作者： Zhanga, Chaoyi Penga, Silu Hana, Jiayue Lia, Chunyu Zhoua, Hongxi Jiangab, Yadong Wang, Jun School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China

ISBN: (纸本)9781510672321

Due to the increasing demand for miniaturization and portability, the development of self-powered photodetectors that can work without external power supply has aroused great interest among researchers. As a group-10 layered transitional metal dichalcogenides, PtSe2 exhibits potential applications in photoelectric detection because of the unique properties such as high carrier mobility, tunable bandgap, and stability. However, its inherent large dark current hinders the further improvement of the performance of the PtSe2 photodetectors. In this paper, we fabricated a vertically aligned Two-dimensional (2D) van der Waals (vdWs) heterojunction composed of PtSe2 and MoSe2, which exhibits high sensitivity photoelectric detection performance in a wide band from visible light (405 nm) to near-infrared (1550 nm) without external bias. As a result, working in self-driving mode at room temperature, the responsivity and detectivity can reach 22.95 A W-1 and 9.27×1011 Jones with a fast response speed of 180/48 μs. This work is expected to provide a new idea for broadband, energy-efficient and high-performance miniaturized detectors. © 2023 SPIE. All rights reserved.

关键词： Platinum compounds

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Omnidirectional and compact Tamm phonon-polaritons enhanced mid-infrared absorber

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Chinese Physics B 2021年第8期30卷 360-363页

作者： Xiaomin Hua Gaige Zheng Fenglin Xian Dongdong Xu Shengyao Wang Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean School of Physics and Optoelectronic EngineeringNanjing University of Information Science and TechnologyNanjing 210044China Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology(CICAEET) Nanjing University of Information Science and TechnologyNanjing 210044China

Narrow band mid-infrared(MIR)absorption is highly desired in thermal emitter and sensing *** theoretically demonstrate that the perfect absorption at infrared frequencies can be achieved and controlled around the surface phonon resonance frequency of silicon carbide(SiC).The photonic heterostructure is composed of a distributed Bragg reflector(DBR)/germanium(Ge)cavity/SiC on top of a Ge ***-wave simulation results illustrate that the Tamm phonon-polaritons electric field can locally concentrate between the Ge cavity and the SiC film,contributed to the improved light-phonon interactions with an enhancement of light *** structure has planar geometry and does not require nano-patterning to achieve perfect absorption of both polarizations of the incident light in a wide range of incident *** absorption lines are tunable via engineering of the photon band-structure of the dielectric photonic nanostructures to achieve reversal of the geometrical phase across the interface with the plasmonic absorber.

关键词： perfect absorption surface phonon polaritons mid-infrared distributed Bragg reflector

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Broadband microwave photonic mixer based on a single dual-drive Mach-Zehnder modulator with high image rejection ratio

Broadband microwave photonic mixer based on a single dual-dr...

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2023 Applied Optics and Photonics China: AI in Optics and Photonics, AOPC 2023

作者： Su, Pengfei Lyu, Weiqiang Zhang, Lingjie Zhang, Zhiyao Liu, Yong State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China

ISBN: (纸本)9781510672383

A microwave photonic image rejection mixer (IRM) with large operation bandwidth and high image rejection ratio (IRR) is proposed and demonstrated based on a single dual-drive Mach-Zehnder modulator (DDMZM) and a wavelength division multiplexer (WDM). In the proposed scheme, the two radio-frequency (RF) ports of the DDMZM is driven by a RF signal and a local oscillator (LO) signal, respectively. Two intermediate-frequency (IF) signals are generated by beating the upper sideband and the lower sideband of the DDMZM, respectively. Then, the two IF signals are injected into an electrical 90° hybrid coupler (HC) to realize image rejection. In the experiment, a stable IRR above 60 dB in the RF signal frequency range of 10 GHz to 40 GHz and with a 1- GHz fixed IF signal frequency is achieved. When the IF signal frequency is changed from 1 GHz to 6 GHz and the LO signal is with a fixed frequency of 29 GHz, the IRR can also large than 60 dB. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Light modulators

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Optical RIS-aided Covert Visible Light Communications

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IEEE Transactions on Vehicular technology 2025年

作者： Qian, Lei Wu, Fangqian Wang, Di Huang, Nuo Xu, Zhengyuan Tiangong University Tianjin Key Laboratory of Optoelectronic Detection Technology and System School of Electronic and Information Engineering Tianjin300160 China University of Science and Technology of China Cas Key Laboratory of Wireless-Optical Communications School of Information Science and Technology Hefei230027 China

This paper investigates a covert visible light communication (VLC) system, where a transmitter (Alice) aims to send confidential information to a legitimate user (Bob) while avoiding being detected by an unauthorized warden (Willie). To achieve this, we propose an optimization framework that controls both reflection by mirror array-based reconfigurable intelligent surface (mRIS) and refraction by liquid crystal-based RIS (LC-RIS) to reconstruct a desired covert optical transmission environment. Considering the covertness constraint with the strongest Willie aided by LC-RIS, we jointly optimize the rotation configuration of mRIS, the parameter of Bob's LC-RIS, and the average optical intensity of Alice by a proposed stepwise decoupling method. The simulation results show that the deployment of LC-RIS on Bob's receiver has a more significant impact on enhancing covert VLC performance compared to the deployment of mRIS. © 2025 IEEE.

关键词： Optical communication

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Deep learning autofluorescence-harmonic microscopy

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Light(Science & Applications) 2022年第4期11卷 697-710页

作者： Binglin Shen Shaowen Liu Yanping Li Ying Pan Yuan Lu Rui Hu Junle Qu Liwei Liu Key Laboratory of Optoelectronic Devices and Systems of Guangdong Province and Ministry of Education College of Physics and Optoelectronic EngineeringShenzhen University518060 ShenzhenChina Shenzhen Meitu.Innovation Technology LTD 518060 ShenzhenChina. China-Japan Union Hospital of Jilin University 130033 ChangchunChina The Sixth People's Hospital of Shenzhen 518052 ShenzhenChina

Laser scanning microscopy has inherent tradeoffs between imaging speed,field of view(FOV),and spatial resolution due to the limitations of sophisticated mechanical and optical setups,and deep learning networks have emerged to overcome these limitations without changing the ***,we demonstrate deep learning autofluorescence-harmonic microscopy(DLAM)based on self-alignment attention-guided residual-in-residual dense generative adversarial networks to close the gap between speed,FOV;and *** the framework,we demonstrate label-free large-field multimodal imaging of clinicopathological tissues with enhanced spatial resolution and running time *** quality assessments show that the attention-guided residual dense conneaions minimize the persistent noise,distortions,and scanning fringes that degrade the autofluorescence-harmonic images and avoid reconstruction artifaas in the output *** the advantages of high contrast,high fidelity,and high speed in image reconstruction,DLAM can act as a powerful tool for the noninvasive evaluation of diseases,neural activity,and embryogenesis.

关键词： networks Deep harmonic

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Effect of SiO_(2)introduction on luminescence properties of LuAG:Mn^(2+) phosphors

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Journal of Rare Earths 2022年第2期40卷 253-259,I0003页

作者： Chenyao Zhao Hui Lin Dawei Zhang Ruijin Hong Shengming Zhou Engineering Research Center of Optical Instrument and System Ministry of Education and Shanghai Key Lab of Modem Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China Laboratory of Micro-Nano Optoelectronic Materials and Devices Key Laboratory of Materials for High-Power LaserShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China

Mn^(2+)doped LuAG phosphors with different contents of Si^(4+)ions were synthesized via the solid-state reaction method and the effects of Si^(4+)doping on the crystal structure and luminescence properties of phosphors were *** patterns of all phosphors exhibit a pure phase but with different extents of *** to the 4 T1→6 A1 transition of Mn^(2+),the LuAG:Mn^(2+),Si^(4+)phosphors exhibit a broad emission band with an emission peak at 582 ***,the introduction of Si^(4+)not only improves the emission intensity but also induces a red-shift with the emission peak from 582 to 612 nm and the spectra broadening with the full width at half maximum value from 64 to 74 nm,which results from the decrease of bond length between O2-anions and Mn^(2+)cations and the re-absorption of Mn^(2+)-Mn^(2+)*** content of Si^(4+)replacement can weaken thermal quenching of Mn^(2+).Thus,via regulating the content of Si,the Mn^(2+),Si^(4+)co-doped LuAG phosphor with low correlated color temperature is a candidate for warm wLEDs.

关键词： Lu_(3)Al_(5)O_(12) Mn^(2+)luminescence Warm white LEDs Transition metal luminescence Rare earths

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3D Dirac semi-metal Cd3As2/Bi2O2Se film heterojunction for visible to near infrared photo-detection 9

3D Dirac semi-metal Cd3As2/Bi2O2Se film heterojunction for v...

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9th Symposium on Novel Photoelectronic detection technology and Applications

作者： Lv, BuJingDou Yue, Chao Wei, YuChao Zhang, XingChao Zhou, HongXi Jiang, YaDong Wang, Jun School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China

ISBN: (纸本)9781510664432

Cd3As2 is a representative three-dimensional (3D) Dirac semi-metal materials, which is expected to develop high-performance wide spectrum photodetectors due to the unique optical and electrical properties. For instance, the band structure exhibits a unique three-dimensional Dirac structure which express the characteristics of zero band-gap and full spectral absorption, high photocurrent response and the ultra-high charge mobility, these characteristics make it a more potential candidate for photodetection. However, arising from its excellent conductivity, the extremely high dark currents in 3D semi-metal based photodetector is an imperfection that limit the development of individual Cd3As2 film photoconductive detector. Here in, we developed an Cd3As2/Bi2O2Se heterojunction by thermal depositing Bi2O2Se film on the as-prepared Cd3As2 film. The Cd3As2/Bi2O2Se heterojunction film photodetector demonstrates a relative broad spectrum photodetection from visible (405nm) to near infrared (1310nm) at room temperature with high responsivity (Ri) and fast response time (τ). These results show that the dark current is reduced about a half compared to the individual Cd3As2 film at the same bias voltage. Subsequently, at the bias voltage of 3 volts, we tested the detector performance under 808nm laser irradiation, in which the maximum photocurrent responsivity (Ri) can be reached to 17.8 mA/W. We analyze that the greatly enhanced-performance improvement of the device maybe originated from its vertical structure advantages, due to the formed internal potential barrier would be accelerates the speed of collecting carrier. This work provides a suitable method and reference for fabricating broad-spectrum and high-speed Cd3As2 based inorganic photodetectors. © 2023 SPIE.

关键词： Photodetectors

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SnO2-Based optoelectronic Synapses for Artificial Visual Applications 2

SnO2-Based Optoelectronic Synapses for Artificial Visual App...

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2023 2nd International Conference on Electronics and Integrated Circuit technology, EICT 2023

作者： Wang, Jinyong Leng, Yangming Zhao, Tiancheng Li, Chunmei Gu, Deen Li, Wei School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu611731 China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu611731 China

optoelectronic synapse units have been drawing a strong interest lately due to their obvious crucial role in the evolution of optoelectronic integration-based neuromorphic computing. Here, optoelectronic synaptic devices are fabricated based on stannic oxide (SnO2) film and with the structure of ITO/SnO2/P++-Si. Using optical stimulation, we found that the synaptic sandwich devices are highly responsive and exhibit fast switching behavior. These optically stimulated synaptic devices accurately could imitate synaptic functions, including paired-pulse facilitation (PPF), excitatory postsynaptic current (EPSC), learning experience behavior, and the conversion from short-term memory (STM) to long-term memory (LTM). The EPSC of such devices could be tuned via light, contributing to an LTM-based analog of optical memory and enhancing learning across affective situations. The work presented here advances the research and manufacture of optoelectronic synapses based on the SnO2 thin films for neuromorphic computing applications. © Published under licence by IOP Publishing Ltd.

关键词： Condensed matter physics

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Deep Learning Enhanced Fluorescence Fluctuations Super-Resolution Microscopy 3

Deep Learning Enhanced Fluorescence Fluctuations Super-Resol...

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3rd Conference on Biomedical Photonics and Cross-Fusion, BPC 2024

作者： Li, Yanru Liu, Lixin Wang, Lin School of Optoelectronic Engineering Xidian University Shaanxi Xi'an710071 China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Guangdong Shenzhen518060 China Central Laser Facility Research Complex at Harwell Science and Technology Facilities Council Rutherford Appleton Laboratory Harwell Didcot OxfordOX11 0QX United Kingdom

ISBN: (纸本)9781510682849

Fluorescence fluctuations super-resolution microscopy (FF-SRM) is a powerful tool in imaging and monitoring of biological subcellular structures and dynamics in cells. A variety of image reconstruction algorithms have been developed for FF-SRM. In order to obtain high spatiotemporal resolution, a U-Net-based deep learning method for super-resolution imaging of fluorescence fluctuations was developed. With just 20 frames, super-resolution images reconstructed using U-Net model could be comparable to those reconstructed using VeSRRF algorithm with several hundred frames, demonstrating its capability of advancing imaging capabilities. © 2024 SPIE

关键词： Fluorescence imaging

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