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7th International Conference on optical and Photonic engineering (icOPEN)

作者： Hegde, Sapthami Anchan, Bhavana Kamath, Saritha U. Kini, Sudarshan De, Shounak Patil, Ajeetkumar MAHE Dept Atom & Mol Phys Manipal 576104 India MAHE Manipal Coll Hlth Profess Dept Med Lab Technol Manipal India Nitte Ctr Sci Educ & Res Biomed Sci Mangalore 575018 India MAHE MIT Dept Elect & Commun Engn Manipal 576104 India

ISBN: (数字)9781510631601

ISBN: (纸本)9781510631601

Zinc oxide is a preferred choice for several optoelectronic applications owing to their unique properties, such as wider band gaps combined with high exciton binding energies. A zinc oxide thin film was grown on glass substrates through sol-gel depositing method followed by heat treatments. We prepared the zinc oxide thin films using zinc acetate dihydrate, 2-methoxy ethanol and diethanolamine as zinc alkoxide precursor, solvent and sol stabilizer respectively. Structural and optical characterizations were carried out that included X-ray diffraction, Atomic force microscopy, Profilometry and Uv-visible spectrophotometry. A coplanar configuration of device has been chosen where the structure has Zinc oxide thin film on which metal contacts of 100 nm thickness were deposited onto the films via thermal evaporation. A two probe source meter was used for I-v measurements in dark environment. I-v measurements have been done for various concentrations of biomolecules (vitamin B6). It is found that there are variations in current for increasing concentrations.

关键词： Metal oxide thin film Biosensor Iv characteristics vitamin B molecules

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design and Prototyping of a Freeform Light-Guide for Automotive Lighting 19

Design and Prototyping of a Freeform Light-Guide for Automot...

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19th Conference on current developments in Lens design and optical engineering

作者： Brand, Audrey C. Alisafaee, Hossein Rose Hulman Inst Technol Dept Phys & Opt Engn 5500 Wabash Ave Terre Haute IN 47803 USA

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

We have designed a light-guide for lighting applications, including automotive headlamps. The light-guide is designed based on a free-form slab. Our intention has been to optimize the design for creating legal patterns. One of our objectives has been to investigate how the changes in the shape of the freeform light-guide affects the light pattern, and how the light source geometry affects the design. For prototyping purpose, we use a particular polymer that exhibits optical performance close to acrylic (PMMA).

关键词： Automotive Lighting Lighting Light-guide optical design Illumination

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The vector-apodizing phase plate coronagraph: design, current performance, and future development

arXiv

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arXiv 2021年

作者： Doelman, David S. Snik, F. Por, E.H. Bos, S.P. Otten, G.P.P.L. Kenworthy, M. Haffert, S.Y. Wilby, M. Bohn, A.J. Sutlieff, B.J. Miller, K. Ouellet, M. de Boer, J. Keller, C.U. Escuti, M.J. Shi, S. Warriner, N.Z. Hornburg, K.J. Birkby, J.L. Males, J. Morzinski, K.M. Close, L.M. Codona, J. Long, J. Schatz, L. Lumbres, J. Rodack, A. van Gorkom, K. Hedglen, A. Guyon, O. Lozi, J. Groff, T. Chilcote, J. Jovanovic, N. Thibault, S. de Jonge, C. Allain, G. vallée, C. Patel, D. Côté, O. Marois, C. Hinz, P. Stone, J. Skemer, A. Briesemeister, Z. Boehle, A. Glauser, A.M. Taylor, W. Baudoz, P. Huby, E. Absil, O. Carlomagno, B. Delacroix, C. Leiden Observatory Leiden University P.O. Box 9513 Leiden2300 RA Netherlands Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States Aix Marseille Univ CNRS CNES LAM Marseille France Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721 United States Anton Pannekoek Institute for Astronomy University of Amsterdam Science Park 904 Amsterdam1098 XH Netherlands COPL Département de physique génie physique et optique Université Laval 2375 rue de la Terrasse QuebecG1V 0A6 Canada Department of Electrical and Computer Engineering North Carolina State University RaleighNC27695 United States Department of Physics University of Oxford Denys Wilkinson Building Keble Road OxfordOX1 3RH United Kingdom Harvard & Smithsonian | Center for Astrophysics 60 Garden St CambridgeMA02138 United States College of Optical Sciences University of Arizona 1630 E University Blvd TucsonAZ85719 United States 650 North A‘ohōkū Place HiloHI96720 United States Astrobiology Center of NINS 2-21-1 Osawa Mitaka Tokyo181-8588 Japan NASA-Goddard Space Flight Center GreenbeltMD United States Department of Physics University of Notre Dame South BendIN United States Department of Astronomy California Institute of Technology 1200 East California Blvd. PasadenaCA91125 United States SRON Netherlands Institute for Space Research Landleven 12 Groningen9747AD Netherlands National Research Council of Canada Herzberg 5071 West Saanich Road VictoriaBCV9E 2E7 Canada Department of Physics and Astronomy University of Victoria 3800 Finnerty Road VictoriaBCV8P 5C2 Canada Department of Astronomy and Astrophysics University of California Santa Cruz 1156 High Street Santa CruzCA95064 United States Naval Research Laboratory Remote Sensing Division 4555 Overlook Ave. SW WashingtonDC20375 United States Institute for Particle Physics and Astrophysics ETH Zurich Wolfgang-Paulistr. 27 Zurich8093 Switzerland UK

Over the last decade, the vector-apodizing phase plate (vAPP) coronagraph has been developed from concept to on-sky application in many high-contrast imaging systems on 8-m class telescopes. The vAPP is an geometric-phase patterned coronagraph that is inherently broadband, and its manufacturing is enabled only by direct-write technology for liquid-crystal patterns. The vAPP generates two coronagraphic PSFs that cancel starlight on opposite sides of the point spread function (PSF) and have opposite circular polarization states. The efficiency, that is the amount of light in these PSFs, depends on the retardance offset from half-wave of the liquid-crystal retarder. Using different liquid-crystal recipes to tune the retardance, different vAPPs operate with high efficiencies (> 96%) in the visible and thermal infrared (0.55 µm to 5 µm). Since 2015, seven vAPPs have been installed in a total of six different instruments, including Magellan/MagAO, Magellan/MagAO-X, Subaru/SCExAO, and LBT/LMIRcam. Using two integral field spectrographs installed on the latter two instruments, these vAPPs can provide low-resolution spectra (R∼30) between 1 μm and 5 μm. We review the design process, development, commissioning, on-sky performance, and first scientific results of all commissioned vAPPs. We report on the lessons learned and conclude with perspectives for future developments and applications. © 2021, CC BY.

关键词： optical transfer function

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A wideband transimpedance amplifier with tee network topology

A wideband transimpedance amplifier with tee network topolog...

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International Conference on Solid-State and Integrated Circuit Technology

作者： Rui Yang Shao-Wei Zhen You-Run Zhang Yi-Qiang Zhao Xiao Yang Bo Zhang School of Electronic Science and Engineering (National Exemplary School of Microelectronics) State key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9781728162355

ISBN: (纸本)9781728162362

In this paper, a wideband transimpedance amplifier (TIA) was proposed for high speed optical receiver chips. The proposed TIA replaces feedback resistance in conventional design with a kind of tee network circuit. Consequently, the bandwidth (BW) and phase margin (PM) of TIA are enhanced significantly. Besides, cascade current mirror was also used for improving power supply rejection ratio (PSRR). This wideband TIA was designed in standard 0.35 CMOS technology. Simulation results show that the proposed TIA has a bandwidth of 145 MHz, low frequency transimpedance gain of 93 dBΩ, phase margin of more than 66° and low frequency power supply rejection ratio (PSRR) of -157dB. And the average input referred noise current spectral density is 6. 8pA/√HZ from DC to 500 MHz. The TIA we designed dissipates only 3.5 mW with a 3.3 v power supply.

关键词： Gain Wideband Mathematical model current mirrors Simulation Power supplies optical receivers

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optical design of LED Marine Beacons 19

Optical Design of LED Marine Beacons

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19th Conference on current developments in Lens design and optical engineering

作者： Lin, Shih-Kang Jen, Yung-Chang Lee, Xuan-Hao Yu, Yeh-Wei Yang, Tsung-Hsun Sun, Ching-Cherng Natl Cent Univ Dept Opt & Photon Chungli 32001 Taiwan Natl Cent Univ Opt Sci Ctr Taoyuan 32001 Taiwan

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

Two optical designs for marine beacon based on Direct In-line Package (DIP) LED is proposed and demonstrated. The luminous intensity of the marine beacon using DIP LED can achieve to the IALA recommendation's requirement of 5 nautical miles. The measurement of color coordinates can also fit the IALA recommendation's requirement. By the surface-structured TIR lens, we successfully keep the divergence angle to 68 degrees in the horizontal direction and converge to 8 degrees in the vertical direction.

关键词： DIP LED optical design marine beacons IALA

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Integrated multi-objective optimisation of the support structure of heliostats in concentrated solar power plants using a genetic algorithm

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IOP Conference Series: Materials Science and engineering 2022年第1期1214卷

作者： L Lomazzi F Cadini M Giglio C Cancro G Ciniglio G Graditi A Pontecorvo Politecnico di Milano Department of Mechanical Engineering Via La Masa n.1 Milan Italy Italian National Agency for New Technologies Energy and Sustainable Economic Development ENEA – Research Center Piazza E. Fermi 1 80055 Portici (NA) Italy

The optimisation of the support structure of heliostats in concentrating solar power plants is a fundamental task aimed at attempting to reduce the high levelised cost of energy (LCOE) of current configurations. In this work, an integrated multi-objective optimisation framework is presented, which relies on the combination of a lean and fast structural model with a genetic algorithm to simultaneously minimise both the overall mass of the support structure and the mean angle of rotation of the mirror surface, which directly affects the optical efficiency of the component. A particular feature of the proposed framework is that it represents an integrated solution, i.e., it allows to simultaneously optimise the main components of the heliostat support structure, i.e., the pedestal, the truss and the back support structure, assuming they are off-the-shelf components easily available on the market. The optimisation problem is set up selecting as design variables (i) the number of elements in the back support structure and (ii) the relevant characteristics of all the components considered, i.e., section shape and dimensions, according to the components commercial datasheets. At each iteration of the optimisation process, the structural model is fed with the current design variables values and, according to some computed aerodynamic loads, it allows evaluating the displacement and rotation of the points of interest within the mirror surface. An aerodynamic model present in the literature based on experimental wind tunnel tests is used to estimate the wind forces acting on the heliostat as a function both of the mirror inclination angle with respect to the ground and of the wind direction with respect to the mirror orientation. In this work, the proposed methodology is demonstrated on a realistic case study and the results commented in detail, highlighting possible future developments and the limitations of the framework.

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一种大功率高重频脉冲激光电源的研究

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电子设计工程 2022年第6期30卷 151-155页

作者：邹锦浪沈昂何娇娇王邦兴徐欢嵇保健上海空间电源研究所上海200245 南京理工大学自动化学院江苏南京210094

基于半导体激光器的用电需求,针对传统BUCK恒流源技术和储能电容线性放电输出技术的不足,提出了一种新的大功率高重频脉冲激光电源实现方案。通过对相关电路及结构进行的电性能及热仿真分析以及两台工程样机与激光器负载的对接实验,表... 详细信息

基于半导体激光器的用电需求,针对传统BUCK恒流源技术和储能电容线性放电输出技术的不足,提出了一种新的大功率高重频脉冲激光电源实现方案。通过对相关电路及结构进行的电性能及热仿真分析以及两台工程样机与激光器负载的对接实验,表明所研究的脉冲激光电源具有高重频、大功率、高动态响应、高同步精度等特点,输出的脉冲电流宽度、重复频率、电流大小均可调,最大脉冲宽度为500μs,最高重复频率为500 Hz,输出电压为260~280 v,单路满载输出最大电流为390 A,上升沿时间小于45μs,上升沿同步时间小于5μs,下降沿时间小于25μs,下降沿同步时间小于2.5μs,对研究大功率半导体激光器的驱动电源具有重要的实用意义。

关键词：大功率半导体激光器脉冲激光电源高重频电流同步

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Water drop-surface interactions as the basis for the design of anti-fogging surfaces: Theory, practice, and applications trends

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ADvANCES IN COLLOID AND INTERFACE SCIENCE 2019年 263卷 68-94页

作者： Duran, Ivan Rodriguez Laroche, Gaetan Univ Laval Dept Genie Mines Met & Mat Ctr Rech Mat Avances Lab Ingn Surface 1065 Ave Med Quebec City PQ G1V 0A6 Canada Hop St Francois Assise Ctr Hosp Univ Quebec Ctr Rech 10 Rue Espinay Quebec City PQ G1L 3L5 Canada

Glass- and polymer-based materials have become essential in the fabrication of a multitude of elements, including eyeglasses, automobile windshields, bathroom mirrors, greenhouses, and food packages, which unfortunately mist up under typical operating conditions. Far from being an innocuous phenomenon, the formation of minute water drops on the surface is detrimental to their optical properties (e.g., light-transmitting capability) and, in many cases, results in esthetical, hygienic, and safety concerns. In this context, it is therefore not surprising that research in the field of fog-resistant surfaces is gaining in popularity, particularly in recent years, in view of the growing number of studies focusing on this topic. This review addresses the most relevant advances released thus far on anti-fogging surfaces, with a particular focus on coating deposition, surface micro/nanostructuring, and surface functionalization. A brief explanation of how surfaces fog up and the main issues of interest linked to fogging phenomenon, including common problems, anti-fogging strategies, and wetting states are first presented. Anti-fogging mechanisms are then discussed in terms of the morphology of water drops, continuing with a description of the main fabrication techniques toward anti-fogging property. This review concludes with the current and the future perspectives on the utility of anti-fogging surfaces for several applications and some remaining challenges in this field. (C) 2018 Elsevier B.v. All rights reserved.

关键词： Anti-fogging surface Water drop Filmwise condensation Cassie-Baxter equation Self-healable coating Anti-bacterial activity

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Inverse-designed diamond photonics

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NATURE COMMUNICATIONS 2019年第1期10卷 1-7页

作者： Dory, Constantin vercruysse, Dries Yang, Ki Youl Sapra, Neil v. Rugar, Alison E. Sun, Shuo Lukin, Daniil M. Piggott, Alexander Y. Zhang, Jingyuan L. Radulaski, Marina Lagoudakis, Konstantinos G. Su, Logan vuckovic, Jelena Stanford Univ EL Ginzton Lab Stanford CA 94305 USA Univ Calif Davis Elect & Comp Engn Davis CA 95616 USA Univ Strathclyde Dept Phys Glasgow G4 0NG Lanark Scotland

Diamond hosts optically active color centers with great promise in quantum computation, networking, and sensing. Realization of such applications is contingent upon the integration of color centers into photonic circuits. However, current diamond quantum optics experiments are restricted to single devices and few quantum emitters because fabrication constraints limit device functionalities, thus precluding color center integrated photonic circuits. In this work, we utilize inverse design methods to overcome constraints of cutting-edge diamond nanofabrication methods and fabricate compact and robust diamond devices with unique specifications. Our design method leverages advanced optimization techniques to search the full parameter space for fabricable device designs. We experimentally demonstrate inverse-designed photonic free-space interfaces as well as their scalable integration with two vastly different devices: classical photonic crystal cavities and inverse-designed waveguide-splitters. The multi-device integration capability and performance of our inverse-designed diamond platform represents a critical advancement toward integrated diamond quantum optical circuits.

关键词： Nanophotonics and plasmonics Quantum information

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Reasonable design of high-capacity MnO2/MXene/CF flexible cathodes for quasi-solid-state aqueous zinc-ion batteries

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Journal of Alloys and Compounds 2025年 1031卷

作者： Pang, Xinyu Liu, Qifan Li, Maokun Fan, Zhanhui Yang, Chao Qiu, Jianhui He, Minhua Zang, Limin MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials Guangxi Key Laboratory of Optical and Electronic Materials and Devices Guangxi Colleges and Universities Key Laboratory of Natural and Biomedical Polymer Materials College of Materials Science and Engineering Guilin University of Technology Guilin541004 China Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization Guangxi Minzu University Nanning530006 China Department of Machine Intelligence and Systems Engineering Faculty of Systems Science and Technology Akita Prefectural University Yurihonjo015-0055 Japan Guangxi Huazheng New Energy Technology Co. Ltd. Chongzuo532299 China

Manganese-based aqueous zinc-ion batteries (AZIBs) have garnered growing interest in the area of adaptable and wearable devices because of their properties of simple manufacturing, superior safety, and ecological compatibility. Nevertheless, the actual implementation of Mn-based cathodes has faced challenges due to their inadequate conductivity and poor cycling performance. In this study, a chemical synthesis approach was employed to directly grow MnO2 on the surface and within the interlayer spaces of MXene. Subsequently, the composite was coated onto carbon felt (CF) using the impregnation method to fabricate binder-free MnO2/MXene/CF cathodes for AZIBs. The excellent conductivity and structural stability of MXene effectively enhance ion/electron transport kinetics and mitigate irreversible volume changes of MnO2 during charge and discharge processes. CF with excellent electrical conductivity and flexibility serves as an ideal current collector and substrate material for loading active materials. Moreover, its distinctive three-dimensional porous structure facilitates optimal interaction between the electrode material and the electrolyte. Consequently, the flexible quasi-solid-state AZIB, consisting of the optimized MnO2/MXene/CF cathode and zinc foil anode, exhibits high charge storage performance (a specific capacity of 429.1 mAh g−1 at 0.1 A g−1 and an excellent energy density of 343.2 Wh kg−1 at 79.9 W kg−1). Density functional theory analysis reveals that the incorporation of MXene enhances electron adsorption on MnO2 and significantly alters the density of states of MnO2, thus markedly improving its conductivity. These encouraging findings suggest that manganese-based materials hold great potential for application as cathodes in flexible quasi-solid-state AZIBs. © 2025 Elsevier B.v.

关键词： Carbon carbon composites

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