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Enhanced efficiency of high-speed Si and Si-based PbSe MSM photodiodes with integrated photon-trapping holes at 800–1550 nm wavelengths

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Chinese Optics Letters 2024年第10期22卷 58-64页

作者： Lixin Liu Jun Gou Chunyu Li Jiayue Han Xiutao Yang Jin Chen Zijian Zhang Zheyuan Xie He Yu Zhiming Wu Jun Wang School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China Key Laboratory of Science and Technology on Infrared Detector Luoyang 471099China

We theoretically and experimentally demonstrate a cylinder-shaped hole array with a small depth and an appropriate period integrated on a silicon-on-insulator substrate can enhance infrared absorption due to more bending of light and a higher back *** Si metal-semiconductor-metal(MSM)photodiode with an hole array,whose depth is 250 nm,exhibits a4-fold improved external quantum efficiency(EQE)of 81%,and an ultra-fast impulse response speed of 22 ps enabling a 3 d B bandwidth of up to 23.9 *** film with a thickness of 80 nm is integrated to broaden the response wavelength.A more than 500%EQE enhancement of the Si-based PbSe photodiode with 150-nm-deep photon-trapping holes is achieved at1550 nm compared to the device without hole structures.

关键词： Si photodiode photon-trapping holes MSM Si-based PbSe photodiode enhanced EQE

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Sensitivity improvement by Vernier effect in microwave photonic filter based on F-P fiber ring

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optoelectronics Letters 2025年

作者： LIN Rui ZHANG Ailing CHANG Pengxiang PAN Honggang WANG Minghe WANG Bo Engineering Research Center of Optoelectronic Devices & Communication Technology， Ministry of Education， Tianjin Key Laboratory of Film Electronic and Communication Devices， School of Electrical and Electronic Engineering， Tianjin University of Technology

A high sensitivity fiber optic temperature sensor based on Vernier effect in microwave photonic filter based on two paralleled F-P (Fabry-Perot) fiber ring is proposed and experimentally verified. Sensitivity is improved through the Vernier effect， which is caused by two parallel F-P fiber rings with approximate lengths. Temperature interrogation is achieved by monitoring the notch frequency of the superimposed frequency response curve. The temperature sensitivity of -484.514kHz/℃ is achieved in experiment， which is 57 times of the sensor without Vernier effect. The improved sensitivity and simple structure make it have wide potential applications in temperature monitoring of power systems.

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Porphyrin-based Nanosonosensitizers Combined with Targeting Peptides for Sonodynamic Therapy of Glioma

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Chinese Journal of Polymer Science 2022年第9期40卷 1120-1128页

作者： Mei-Yu Jiang Jia-Sheng Wu Wei-Min Liu Hao-Hui Ren Xin Wang Peng-Fei Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

Traditional cancer treatments have disadvantages of large trauma area and toxic side effects while killing cancer ***-targeted sonodynamic therapy(SDT)can effectively improve specificity of cancer treatment and overcome the problem of low tissue penetration depth caused by a photo-driven ***,we developed a porphyrin-based sonosensitizer with a water-soluble polymer as a biological carrier and a cRGD peptide for tumor targeting,which constituted a nano sonosensitizer(T-cRGD NPs)for fluorescence imaging-guided sonodynamic therapy.A comparable sonosensitizer(T-PEG NPs)without the targeting unit was also prepared for illustration of therapeutic *** to the role of peptide targeting,T-cRGD NPs can accumulate and enter tumor cells for fluorescence imaging and show a superior SDT effect than T-PEG NPs in *** imaging in vivo reveals that T-cRGD NPs can enrich in tumor tissues within 14 h with a good biocompatibility.

关键词： Sonodynamic therapy Glioma Cyclic peptide Target enrichment Deep penetration

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Crosstalk-free multichannel sensor based on a dual-Sagnac interferometer interrogated by microwave photonic filter

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optoelectronics Letters 2025年

作者： ZHANG Ailing WANG Bo ZHANG Yongfu CHANG Pengxiang WANG Minghe LIN Rui Engineering Research Center of Optoelectronic Devices & Communication Technology， Ministry of Education， Tianjin Key Laboratory of Film Electronic and Communication Devices， School of Electrical and Electronic Engineering， Tianjin University of Technology

A crosstalk-free multichannel sensor based on a dual-Sagnac interferometer interrogated by microwave photonic filter (MPF) is demonstrated theoretically and experimentally in this paper. The dual-Sagnac interferometer is taken as the sensing element as well as an optical spectrum slicer to implement a dual-passband MPF. Experimental results show that the proposed multichannel sensor is crosstalk-free， and the temperature sensitivity of each channel is -0.9884 MHz/℃ and -1.9302 MHz/℃， respectively. The sensing interrogation system has good linearity and stability and it is suitable for application scenarios where multiple points of temperature are required to monitor simultaneously.

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Highly Sensitive Metamaterial Plasmonic Sensor Based on Nanoimprinting

Highly Sensitive Metamaterial Plasmonic Sensor Based on Nano...

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2023 Opto-Electronics and Communications Conference, OECC 2023

作者： Zheng, Enlai Zhang, Xuanming Lou, Fei Cheng, Xin Lei, Lei Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen China Southern University of Science and Technology Department of Materials Science and Engineering Shenzhen China

ISBN: (纸本)9781665462136

In this paper, we propose and experimentally demonstrate a highly sensitive plasmonic nanohole metasurface sensor using nanoimprinting and electron beam evaporation. A refractive index sensitivity of 516 nm/RIU has been successfully achieved. With the help of nanoimprinting, the proposed method exhibits intrinsic advantages in a simple fabrication process, high repeatability and low cost. Furthermore, the proposed method enables large-area fabrication, making the mass-production of the metamaterial sensor highly feasible. © 2023 IEEE.

关键词： Metamaterials

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Chemical biology investigation of a triple-action,smart-decomposition antimicrobial booster based-combination therapy against“ESKAPE”pathogens

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Science China Chemistry 2024年第9期67卷 3071-3082页

作者： Min Wang Huangsheng Pu Yangfan Xu Chenxuan Wu Yuanxin Gu Qingyun Cai Guoxing Yin Peng Yin Chunhui Zhang Wing-Leung Wong Muyang Wan Yugang Bai Xinxin Feng State Key Laboratory of Chem-/Bio-Sensing and Chemometrics Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biologyand School of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China College of Biology Hunan UniversityChangsha 410082China College of Advanced Interdisciplinary Studies&Hunan Provincial Key Laboratory of Novel Nano Optoelectronic Information Materials and Devices National University of Defense TechnologyChangsha 410073China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research(Ministry of Education) College of Chemistry and Chemical EngineeringHunan Normal UniversityChangsha 410081China State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHong Kong SAR 999077China Hunan Provincial Key Laboratory of Anti-Resistance Microbial Drugs The Third Hospital of Changsha(The Affiliated Changsha Hospital of Hunan University)Changsha 410015China

The global antibiotic resistance crisis necessitates urgent *** innovative approach involves potentiating antibiotics and non-antibiotic drugs with adjuvants or boosters.A major drawback of these membrane-active boosters is their limited biocompatibility,as they struggle to differentiate between prokaryotic and eukaryotic *** study reports the chemical biology investigation of a dual-action oligoamidine(OA1)booster with a glutathione-triggered decomposition ***1,when combined with other antimicrobial molecules,exhibits a triple-targeting mechanism including cell membrane disruption,DNA targeting,and intracellular enzyme *** multi-targeting mechanism not only enhances the in vitro and in vivo eradication of antibiotic-resistant“ESKAPE”pathogens,but also suppresses the development of bacterial ***,OA1 maintains its activity in bacterial cells by creating an oxidative environment,while it quickly decomposes in mammalian cells due to high glutathione *** mechanistic insights and design principles may provide a feasible approach to develop novel antimicrobial agents and effective anti-resistance combination therapies.

关键词： antimicrobial booster oligoamidine membrane disruption DNA targeting triggered degradation anti-resistance

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Construction of a 980 nm laser-activated Pt(Ⅱ)metallacycle nanosystem for efficient and safe photo-induced bacteria sterilization

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Science China Chemistry 2023年第1期66卷 155-163页

作者： Yuling Xu Chonglu Li Jusung An Xin Ma Jingfang Yang Lishi Luo Yun Deng Jong Seung Kim Yao Sun Key Laboratory of Pesticides and Chemical Biology Ministry of EducationInternational Joint Research Center for Intelligent Biosensor Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Department of Chemistry KoreaUniversitySeoul 02841Republic of Korea Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules Hubei UniversityWuhan 430062China State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082China Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan UniversityWuhan 430056China

Although metal-based chemical agents have demonstrated promising bacteriostatic effects in phototherapy,their short excitation/emission wavelengths and inadequate phototherapy efficiencies make their application in vivo *** therefore synthesized a novel Pt(Ⅱ)metallacycle(Pt1110)that can be activated with a 980 nm laser for photodiagnosis/treatment in deep *** found that Pt1110 significantly improved photothermal conversion(95%improvement)and ^(1)O_(2) generation(ΦΔ75%increase)compared to the ligand itself 1 and was well capable of light-induced sterilization under safe laser irradiation(0.72 W/cm^(2)).In addition,Pt1110 has little to no toxicity to *** incorporated into liposome,Pt1110 NPs was effective in wound healing in infection and keratitis models upon laser irradiation,which was accurately observed by NIR-Ⅱfluorescence *** novel metal-coordinated supramolecular material has a potential to become a universal platform for phototherapy in deep tissue.

关键词： supramolecular chemistry metallacycle NIR-Ⅱfluorescence imaging phototheranostics deep penetration

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Self-energy corrections to zone-edge acoustic phonons in monolayer and bilayer WS2

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Physical Review B 2024年第12期109卷 L121202-L121202页

作者： Qixing Wang Yu Li Huang Qi Zhang Jiayu Ma Xin Luo Yun-Mei Li Department of Physics College of Physical Science and Technology Xiamen University Xiamen 361005 China Joint School of National University of Singapore and Tianjin University International Joint Institute of Tianjin University Fuzhou 350207 China School of Physics and Key Laboratory of MEMS of the Ministry of Education Southeast University Nanjing 211189 China State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Centre for Physical Mechanics and Biophysics School of Physics Sun Yat-sen University Guangzhou 510275 China

The self-energy corrections to phonons have mostly been observed for modes with zone-center (q=0) wave vectors. Here, we investigated the self-energy corrections to phonons in ionic-liquid-gated semiconductors, i.e., monolayer and bilayer WS2, experimentally. Apart from the previously observed A1g(Γ) mode renormalization by Raman spectroscopy, we additionally discovered that the zone-edge longitudinal acoustic (LA(M)) phonon also softened under finite electron doping. This observed renormalization effect arises from the LA(M) phonon-assisted electron scattering between the K and Q valleys in the conduction bands, indicating the nonadiabatic self-energy corrections dominate, different from the A1g(Γ) mode. The self-energy corrections of the two modes both depend on layer configurations. Our findings suggest that WS2 and other similar two-dimensional materials are intriguing playgrounds to study the electron-phonon interactions and valley-related physics.

关键词： Acoustic phonons Electron-phonon coupling Layered crystals Semiconductors Wide band gap systems Density functional theory Raman spectroscopy

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Cs/O, Cs/NF3, and Cs/Li/NF3 coadsorption on GaAs0.5P0.5 (001) β2(2×4) reconstruction surface: A first principle study

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Solid State Communications 2024年 394卷

作者： Liu, Jingwen Yang, Mingzhu He, Siyi School of Physics and Optoelectronic Engineering Nanjing University of Information Science and Technology Nanjing210044 China Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean Nanjing University of Information Science and Technology Nanjing210044 China Jiangsu International Joint Laboratory on Meteorological Photonics and Optoelectronic Detection Nanjing University of Information Science and Technology Nanjing210044 China

The activation process of p-type doped GaAs0.5P0.5 (001) β2(2 × 4) reconstruction surface is investigated based on first principle calculations. For Cs-only adsorption, the adsorption energy rises as the Cs coverage increases, and when the Cs coverage is at 0.75 ML, the work function hits its minimum. Cs/O and Cs/NF3 concurrent adsorption are conducive to increasing steadiness and lowering the work function of the reconstruction surface during the phase of high Cs coverage. The work function reaches its minimum when Cs coverage is 0.75 ML in Cs/O coadsorbed models while that occurs when Cs coverage is 1.00 ML in Cs/NF3 coadsorbed models. Results indicate that the Li atoms intercalation with low coverage in Cs/NF3 coadsorbed models is conducive to establishing dipole moments, strengthening stability, and lowering the work function. The optimal adsorption recipe is 6Cs/2Li/NF3, with which the surface owns the lowest work function and shows the most stable property. © 2024 Elsevier Ltd

关键词： Gallium arsenide

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Insulator self-shattering detection based on YOLOv5 under small sample conditions

Insulator self-shattering detection based on YOLOv5 under sm...

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2022 International Conference on Power Electronics and Electrical technology, ICPEET 2022

作者： Yang, Yanli Wang, Xinlin Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems Tiangong University Binshuixi Road 399 Xiqing District Tianjin300387 China

Insulators are indispensable devices on power transmission lines. The self-shattering of insulators pose a threat to the operation of transmission lines. Insulators where self-shattering occurs are usually small objects in an image, and samples of insulator self-shattering are scarce. This brings challenges to the intelligent detection of insulator self-shattering. The insulator self-shattering is detected by a YOLOv5 under small sample conditions. Considering the scarcity of insulator self-shattering images, normal samples are used to assist in training a YOLOv5 model. Tests on a few public datasets and some simulated self-shattering images show that the recognition rate can reach 97.43% when the ratio of training to test samples is 1:10.4. The results show that our method provides a way to identify self-shattering insulator under small sample conditions. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： Electric lines

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