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电子技术应用 2025年第5期51卷 10-14页

作者：杨尚争邓新伟毛佳烽胡伟波尚佳彬南开大学电子信息与光学工程学院天津300350

设计实现了一种可以双向使能的负压低压差线性稳压器(LDO)。首先介绍了传统的负压LDO基本架构及工作特点,根据负压LDO的应用场景,提出负压LDO的使能需要双向使能。其次展示传统的使能电路和提出的双向使能电路,并按照正压启动和负压启... 详细信息

设计实现了一种可以双向使能的负压低压差线性稳压器(LDO)。首先介绍了传统的负压LDO基本架构及工作特点,根据负压LDO的应用场景,提出负压LDO的使能需要双向使能。其次展示传统的使能电路和提出的双向使能电路,并按照正压启动和负压启动两种情况分析。最后该负压LDO芯片基于350 nm CMOS工艺设计制造,测试结果显示,该负压LDO在使能信号大于0.6 v小于5 v区间和大于-5 v小于-0.9 v区间内可以实现双向启动,且使能电路在正压启动过程中消耗电流873 nA,在负压启动过程中消耗电流219 nA。

关键词：低压差线性稳压器负压电路使能电路静态电流

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Interband Quantum Cascade Infrared Photodetectors: current Status and Future Trends

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Physical Review Applied 2022年第2期17卷 027001-027001页

作者： P. Martyniuk A. Rogalski S. Krishna Institute of Applied Physics Military University of Technology 2 Kaliskiego Str. 00-908 Warsaw Poland Department of Electric Engineering The Ohio State University 2024 Neil Avenue Columbus Ohio 43210 USA

One of the critical limitations of photonic infrared (IR) photodetectors is the cooling requirement that is placed on it. Uncooled detectors are usually based on thermal detectors. currently, microbolometer thermal detectors are produced in a larger volume than those of all other IR array technologies together. In recent years, their cost has drastically dropped (about 15% per year). Although their performance is modest, thermal detectors suffer from slow responses and they are not useful in multispectral detection. The (Hg,Cd)Te ternary system dominates photonic IR detector technology. It also has a superior performance under high operating temperature (HOT) conditions. At present, technological efforts are directed towards advanced heterojunction photovoltaic (Hg,Cd)Te detectors. In the last decade, several concepts have been proposed to improve the HOT photon detector’s performance to include various kinds of materials, such as type-II AIIIBv superlattices (T2SLs), two-dimensional materials, and colloidal quantum dots. Among them, the most promising are interband quantum cascade photodetectors (IB QCPs) based on AIIIBv T2SLs considered in this paper. This paper reviews the history, present status, and possible future developments of IB QCPs for IR HOT applications. To date, the “Rule 07” metric has been used as a proper approach for the prediction of the photodiode performance of p-on-n (Hg,Cd)Te and as a reference benchmark for alternative technologies. However, recently, it has been shown [Lee et al., Proc. SPIE 11407, 114070X (2020)] that uncooled depletion-limited (Hg,Cd)Te photodiodes exhibit further performance enhancement called “Law 19,” which is background-limited detectivity in the long-wavelength infrared spectral range. In this context, here, the performance of IB QCPs is compared with Law 19.

关键词： optical sources & detectors Optoelectronics Quantum sensing II-vI semiconductors III-v semiconductors Photodiodes Superlattices Infrared techniques

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High-Performance Self-Powered Ultraviolet Photodetector Based on Ga2o3/Gan Heterostructure for optical Imaging

SSRN

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SSRN 2022年

作者： Feng, Siyu Liu, Zitong Feng, Lizhi Wang, Junchao Xu, Hanning Deng, Lijie Zhou, Ouxiang Jiang, Xin Liu, Baodan Zhang, Xinglai Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences No. 72 Wenhua Road Shenyang110016 China School of Materials Science and Engineering University of Science and Technology of China No. 72 Wenhua Road Shenyang110016 China School of Material Science and Engineering Northeastern University No.11 Wenhua Road Shenyang110819 China Foshan Graduate School of Northeastern University No. 2 Zhihui Road Foshan528300 China School of Science Shenyang Ligong University Shenyang110159 China

Gallium oxide (Ga2O3) has attracted much attention for its ultra-wide band gap and superior optoelectronic properties in the field of ultraviolet (Uv) photodetectors. However, Ga2O3-based photodetectors still face problems such as slow response speed, large dark current and high power consumption. In this work, we design an n-Ga2O3/p-GaN vertical heterojunction in a transverse device and use it to construct a high-performance Uv photodetector. The GaN film directly connects to the electrodes, while the Ga2O3 nanowires cover the top surface of the GaN and do not contact with any electrode. Based on this unique heterostructure, the photodetector demonstrates a low dark current and fast photoresponse speed under 254 nm irradiation. On the other hand, the photodetector can be operated at 0 v bias due to asymmetric Schottky barriers caused by the difference in electrode size. The photoresponse, specific detectivity and photoresponse speed of the photodetector are calculated to be 44.98 mA W-1, 5.33 × 1011 Jones and 383 ms, respectively, under self-powered mode. The enhanced Uv photoresponse and self-powered mechanism of the photodetector are discussed in detail via the schematic diagrams of energy band structure and carrier transport process. At last, a vivid image is obtained using the Ga2O3/GaN photodetector as an imaging pixel in the imaging system. This work provides an effective strategy to construct high-performance Uv photodetectors toward optical imaging. © 2022, The Authors. All rights reserved.

关键词： Gallium nitride

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HiPIMS室温溅射晶态氧化铝薄膜的粒子能量调控

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中国表面工程 2022年第5期35卷 246-253页

作者：高方圆许亿李国栋李光夏原中国科学院力学研究所北京100190 中国科学院大学材料科学与光电工程中心北京100049

晶态氧化铝薄膜与非晶态相比,具有更加优良的力学性能和宽波段光学透过性能。基于等离子体发射光谱(OES)反馈控制方法(PEM),引入高能脉冲磁控溅射(HiPIMS)技术,实现了室温条件下晶态γ-Al_(2)O_(3)薄膜的快速制备。采用高压探针、电流... 详细信息

晶态氧化铝薄膜与非晶态相比,具有更加优良的力学性能和宽波段光学透过性能。基于等离子体发射光谱(OES)反馈控制方法(PEM),引入高能脉冲磁控溅射(HiPIMS)技术,实现了室温条件下晶态γ-Al_(2)O_(3)薄膜的快速制备。采用高压探针、电流探针传感器和数字示波器监测HiPIMS的放电特性,采用等离子体发射监测器进行时间平均的OES研究,采用X射线衍射仪和扫描电镜分析薄膜的晶相结构、晶粒尺寸及断面形貌,采用纳米压痕仪测试薄膜的纳米硬度和模量。结果表明,HiPIMS条件下的成膜环境出现大量的离子态,主要包括AlⅡ、ArⅡ甚至高价态粒子OⅣ参与反应。随着溅射电压由650v增加至800 v,晶粒逐渐细化,由18 nm减小到8 nm,同时沉积速率从27 nm/min增加到55 nm/min。基体偏压对薄膜的沉积速率,微结构以及力学性能等方面均有显著的影响。随着基体偏压的增加,γ-Al_(2)O_(3)的择优取向由(422)转变为(311),薄膜在偏压U_(s)=-100 v条件下获得了最高硬度19.3 GPa。通过对成膜粒子能量的设计与调控,进一步优化了薄膜的结构和性能,为功能薄膜氧化铝的大规模产业化奠定良好的应用基础。

关键词： HiPIMS 氧化铝薄膜室温晶化诱导能量调控

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Alleviating the Responsivity-Speed Dilemma of Photodetectors via Opposite Photogating engineering with an Auxiliary Light Source beyond the Chip

Alleviating the Responsivity-Speed Dilemma of Photodetectors...

引用

International Electron Devices Meeting (IEDM)

作者： Yanni Zou Yan Zeng Pengju Tan Xiaolong Zhao Xuanze Zhou Xiaohu Hou Zhongfang Zhang Mengfan Ding Shunjie Yu Hong Huang Qiming He Xiaolan Ma Guangwei Xu Qin Hu Shibing Long School of Microelectronics University of Science and Technology of China Hefei China

ISBN: (纸本)9781665489607

The dilemma between responsivity and response speed (RS dilemma) limits the performance of photodetectors (PDs). Here, opposite photogating (OPG) engineering is proposed to alleviate this RS dilemma via an auxiliary light source beyond the chip. Based on a $\mathrm{W}\mathrm{S}\mathrm{e}_engineering/\mathrm{G}\mathrm{a}_engineering\mathrm{O}_current$ OPG JFET, $\mathrm{a}\gt 10^current$ times faster response speed for deep ultra-violet detection has been achieved with negligible sacrifice of responsivity (R). It further demonstrates a R of $2.28\times 10^current\mathrm{A}/\mathrm{W}$, specific detectivity of $3.64\times 10^{17}$ Jones, photo-to-dark current ratio of $8.99\times 10^engineering, \mathrm{R}_{\mathrm{D}}\mathrm{u}\mathrm{v}/\mathrm{R}_{\mathrm{v}\mathrm{i}\mathrm{s}\mathrm{i}\mathrm{b}}\mathrm{i}_{\mathrm{e}}$ rejection ratio $\gt 9.6\times 10^current$, and external quantum efficiency of $1.11\times 10^current$ %. The strong depletion effect on the channel induced by the auxiliary light facilitates the decay speed, while its weak compensation effect sacrifices negligible R. The OPG engineering provides potential inspiration for the design of highly sensitive PDs.

关键词： X-ray scattering optical microscopy Ultraviolet sources Lighting Photodetectors Surface roughness JFETs

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Material selection for an achromatic and athermal design using the factor of determination on optical glasses 20

Material selection for an achromatic and athermal design usi...

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Conference on current developments in Lens design and optical engineering XX

作者： Lim, Tae-Yeon Kim, Kum-Ho Park, Sung-Chan Dankook Univ Dept Phys 119 Dandae Ro Cheonan Si 31116 Chungcheongnam South Korea

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

This study presents a new method for selecting a pair of optical glass and housing material to achromatize and athermalize a lens system, by use of the factor of determination for material selection. To effectively obtain an optimum combination for materials, we newly propose the sequential material selection method by introducing the factor of determination for material selection, which depends on the level of contribution to correct these aberrations and the availability to be used as a suitable material. Even though there are many cases for material combinations, we can sequentially identify the best pair of glass and housing materials by checking the factor of determination. Using this design approach, we efficiently obtain an achromatic and athermal system through an optimum combination of materials, over the specified ranges in temperature and waveband.

关键词： lens design athermalization achromatization graphic solution

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A Laser Pumping Double-Light-Source Module with Photon-Recycling 20

A Laser Pumping Double-Light-Source Module with Photon-Recyc...

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Conference on current developments in Lens design and optical engineering XX

作者： Lin, Shih-Kang Su, Yu-Wen Lee, Xuan-Hao Yu, Yeh-Wei Yang, Tsung-Hsun Sun, Ching-Cherng Natl Cent Univ Dept Opt & Photon Chungli 32001 Taiwan Feng Chia Univ Dept Opt & Photon Taichung 40724 Taiwan

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

We proposed a novel structure to perform photon recycling for a double-light-source illumination system pumped by a laser. In the design, two kinds of phosphor are located at the two focus of an elliptical reflective surface separately, after the phosphor on the first focus pumped by laser, the backward scattering light will refocus at the other phosphor layer at the second focus. The absorption spectrum of the second phosphor should fit that of the emission light by the first phosphor. When the emission spectrum covers red light, the whole system is a double-light-source module.

关键词： laser diode photon recycling head lamp optical design

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High-Performance Triboelectric Nanogenerator Based on Zno Nanosheets for Self-Powered Cholesteric Liquid Crystal, Electroluminescence, and Portable Electronic Devices

SSRN

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SSRN 2022年

作者： Kumar, Rajaboina Rakesh Supraja, Potu Gollapelli, Buchaiah vallamkondu, Jayalakshmi Mishra, Siju Haranath, Divi Babu, Anjaly Khanapuram, Uday Kumar Puppala, Ravi Sankar Kodali, Prakash Department of Physics Energy Materials and Devices Lab National Institute of Technology Warangal506004 India Department of Physics Liquid Crystals Research Lab National Institute of Technology Warangal506004 India Department of Electronics and Communication Engineering Flexible Electronics Lab National Institute of Technology Warangal506004 India

Low output power and intricate device designs are the major hurdles to use triboelectric nanogenerators as a power source in self-powered device applications. This work reports a high-performance, simple design, and inexpensive triboelectric nanogenerator (TENG) using a new tribo-pair of ZnO nanosheets array and overhead projector (OHP) sheets. The fabricated TENG has produced the maximum output voltage and current of ~292 v, ~54 µA for each hand slapping force. The maximum output power density obtained from the TENG is ~ 680 mW/m 2 . Further, the TENG has shown excellent stability over and above 10,000 cycles. TENG can turn on a digital watch and 136 series-connected LEDs directly without any aid of an energy storage element. Furthermore, instead of using a commercial AC amplifier, TENG's AC output is utilized to control the optical characteristics of the cholesteric liquid crystal (CLC) device. The TENG-powered CLC devices are demonstrated for mobile security, optical switch, webcam security, and self-powered smart windows or e-paper displays. Finally, we have shown self-powered electroluminescence and portable electronic devices. Because it is simple to develop and minimal in cost, the current work has potential application in self-powered devices. © 2022, The Authors. All rights reserved.

关键词： Nanogenerators

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Detector systems engineering for extremely large instruments 9

Detector systems engineering for extremely large instruments

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Conference on X-Ray, optical, and Infrared Detectors for Astronomy IX as part of SPIE Astronomical Telescopes + Instrumentation Conference

作者： George, Elizabeth M. Bezawada, Naidu Ives, Derek Mehrgan, Leander Accardo, Matteo Alvarez, Domingo Brinkmann, Martin Conzelmann, Ralf Cumani, Claudio Downing, Mark Engelhardt, Max Haug, Marcus Hopgood, Joshua Geimer, Christoph Iwert, Olaf Klein, Barbara Mandla, Christopher Mueller, Eric Ramsay, Suzanne Reyes, Javier Richerzhagen, Mathias Serra, Benoit Seidel, Matthias Stegmeier, Joerg Todorovic, Mirko European Southern Observ Karl Schwarzschild Str 2 D-85748 Garching Germany

ISBN: (纸本)9781510636965

The scientific detector systems for the ESO ELT first-light instruments, HARMONI, MICADO, and METIS, together will require 27 science detectors: seventeen 2.5 mu m cutoff H4RG-15 detectors, four 4K x 4K 231-84 CCDs, five 5.3 mu m cutoff H2RG detectors, and one 13.5 mu m cutoff GEOSNAP detector. This challenging program of scientific detector system development covers everything from designing and producing state-of-the-art detector control and readout electronics, to developing new detector characterization techniques in the lab, to performance modeling and final system verification. We report briefly on the current design of these detector systems and developments underway to meet the challenging scientific performance goals of the ELT instruments.

关键词： ELT detectors H4RG-15 CCD GEOSNAP

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Large area optimization of meta-lens via data-free machine learning

arXiv

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arXiv 2022年

作者： Zhelyeznyakov, Maksym v. Fröch, Johannes E. Wirth-Singh, Anna Noh, Jaebum Rho, Junsuk Brunton, Steven L. Majumdar, Arka Department of Electrical and Computer Engineering SeattleWA98195 United States Department of Physics SeattleWA98195 United States Pohang37673 Korea Republic of Pohang37673 Korea Republic of POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics Pohang37673 Korea Republic of Department of Mechanical Engineering University of Washington WA98195 United States

Sub-wavelength diffractive optics meta-optics present a multi-scale optical system, where the behavior of constituent sub-wavelength scatterers, or meta-atoms, need to be modelled by full-wave electromagnetic simulations, whereas the whole meta-optical system can be modelled using ray/ wave optics. current simulation techniques for large-scale meta-optics rely on the local phase approximation (LPA), where the coupling between dissimilar meta-atoms are completely neglected. Here we introduce a physics-informed neural network, which can efficiently model the meta-optics while still incorporating all of the coupling between meta-atoms. Unlike existing deep learning techniques which generally predict the mean transmission and reflection coefficients of meta-atoms, we predict the full electro-magnetic field distribution. We demonstrate the efficacy of our technique by designing 1mm aperture cylindrical meta-lenses exhibiting higher efficiency than the ones designed under LPA. We experimentally validated the maximum intensity improvement (up to 53%) of the inverse-designed meta-lens. Our reported method can design large aperture (∼ 104 − 105λ) meta-optics in a reasonable time (approximately 15 minutes on a graphics processing unit) without relying on any approximation. Copyright © 2022, The Authors. All rights reserved.

关键词： Computational electromagnetics

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