检索结果-内蒙古大学图书馆

Direct visualization of current-Stimulated Oxygen Migration in YBa2Cu3O7-δ Thin Films

ACS NANO 2020年第9期14卷 11765-11774页

作者： Marinkovic, Stefan Fernandez-Rodriguez, Alejandro Collienne, Simon Alvarez, Sylvain Blanco Melinte, Sorin Maiorov, Boris Rius, Gemma Granados, Xavier Mestres, Narcis Palau, Anna Silhanek, Alejandro, v Univ Liege CESAM Expt Phys Nanostruct Mat Q MAT B-4000 Liege Belgium ICMAB CSIC Inst Ciencia Mat Barcelona Campus UAB Barcelona 08193 Spain Catholic Univ Louvain Inst Informat & Commun Technol Elect & Appl Math B-1348 Louvain La Neuve Belgium Los Alamos Natl Lab Mat Phys & Applicat Div Los Alamos NM 87545 USA CSIC Inst Microelect Barcelona IMB CNM Campus UAB Barcelona 08193 Spain

The past years have witnessed major advancements in all-electrical doping control on cuprates. In the vast majority of cases, the tuning of charge carrier density has been achieved via electric field effect by means of either a ferroelectric polarization or using a dielectric or electrolyte gating. Unfortunately, these approaches are constrained to rather thin superconducting layers and require large electric fields in order to ensure sizable carrier modulations. In this work, we focus on the investigation of oxygen doping in an extended region through current-stimulated oxygen migration in YBa2Cu3O7-delta superconducting bridges. The underlying methodology is rather simple and avoids sophisticated nanofabrication process steps and complex electronics. A patterned multiterminal transport bridge configuration allows us to electrically assess the directional counterflow of oxygen atoms and vacancies. Importantly, the emerging propagating front of current-dependent doping S is probed in situ by optical microscopy and scanning electron microscopy. The resulting imaging techniques, together with photoinduced conductivity and Raman scattering investigations, reveal an inhomogeneous oxygen vacancy distribution with a controllable propagation speed permitting us to estimate the oxygen diffusivity. These findings provide direct evidence that the microscopic mechanism at play in electrical doping of cuprates involves diffusion of oxygen atoms with the applied current. The resulting fine control of the oxygen content would permit a systematic study of complex phase diagrams and the design of electrically addressable devices.

关键词： electromigration YBCO superconducting nanoconstrictions memristor high-T-c superconductor

来源：评论

学校读者我要写书评

暂无评论

optical Systems for Large-aperture Phased Laser Array Including Diffractive Optics 20

Optical Systems for Large-aperture Phased Laser Array Includ...

引用

Conference on current developments in Lens design and optical engineering XX

作者： Erlikhman, Jacob Krogen, Peter Srinivasan, Prashant Hettel, Will Meinhold, Peter Lubin, Philip Univ Calif Santa Barbara Dept Phys Broida Hall Santa Barbara CA 93106 USA

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

Directed energy propulsion for interstellar travel has been proposed as an ideal method for reaching appreciable speeds relative to the speed of light: 0.2c. However, the amount of energy required necessitates a large aperture, on the order of kilometers, while mitigation of atmospheric perturbations requires a discretization of the aperture into many individual laser elements. The use of fiber lasers for these elements obligates mode-matching the fiber to the desired 10 cm aperture for a collimated beam. various collimation systems were designed and compared. A 3-lens system with one achromat and two aspheric lenses, with two of the lenses used as a Keplerian telescope to achieve a system-shortening effect was analyzed. A similar system made with a plano-convex lens replacing the large-aperture aspheric lens with two additional compensating lenses was compared. A single diffractive optic operating at F/8 was likewise considered. The optical performance of these systems was compared, as was the cost-effectiveness. Scalability to millions of elements was required, so cost-per-system was a crucial consideration factor. Possible manufacturing processes for a diffractive system were investigated, and stamping processes for replication were analyzed to determine the possibility of replication of such an optic reliably, cheaply, and with acceptable results.

关键词： Directed energy optical design diffractive optical elements corrective optical elements laser propulsion

来源：评论

学校读者我要写书评

暂无评论

A Tb/s Indoor MIMO optical Wireless Backhaul System Using vCSEL Arrays

arXiv

引用

arXiv 2021年

作者： Kazemi, Hossein Sarbazi, Elham Soltani, Mohammad Dehghani El-Gorashi, Taisir E.H. Elmirghani, Jaafar M.H. Penty, Richard v. White, Ian H. Safari, Majid Haas, Harald Department of Electronic and Electrical Engineering University of Strathclyde GlasgowG1 1RD United Kingdom The Institute for Digital Communications University of Edinburgh EdinburghEH9 3FD United Kingdom The School of Electronic and Electrical Engineering University of Leeds LeedsLS2 9JT United Kingdom The Department of Engineering University of Cambridge CambridgeCB2 1PZ United Kingdom

In this paper, the design of a multiple-input multiple-output (MIMO) optical wireless communication (OWC) link based on vertical cavity surface emitting laser (vCSEL) arrays is systematically carried out with the aim to support data rates in excess of 1 Tb/s for the backhaul of sixth generation (6G) indoor wireless networks. The proposed design combines direct current optical orthogonal frequency division multiplexing (DCO-OFDM) and a spatial multiplexing MIMO architecture. For such an ultrahigh-speed line-of-sight (LOS) OWC link with low divergence laser beams, maintaining alignment is of high importance. In this paper, two types of misalignment error between the transmitter and receiver are distinguished, namely, radial displacement error and orientation angle error, and they are thoroughly modeled in a unified analytical framework assuming Gaussian laser beams, resulting in a generalized misalignment model (GMM). The derived GMM is then extended to MIMO arrays and the performance of the MIMO-OFDM OWC system is analyzed in terms of the aggregate data rate. Novel insights are provided into the system performance based on computer simulations by studying various influential factors such as beam waist, array configuration and different misalignment errors, which can be used as guidelines for designing short range Tb/s MIMO OWC systems. © 2021, CC BY.

关键词： Laser beams

来源：评论

学校读者我要写书评

暂无评论

current trends, challenges, and perspectives of anti-fogging technology: Surface and material design, fabrication strategies, and beyond

引用

PROGRESS IN MATERIALS SCIENCE 2019年 99卷 106-186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

Transparent materials such as glasses and some polymers play an essential role in our daily life. Indeed, it is well known that their application in mirrors, windows, automobile windshields, and eyewear make our day-to-day activities more comfortable. These examples aside, many more can also be found in several spheres of human activity, including such sectors as diverse and distinct as the medical, photovoltaic and food industry fields. Unfortunately, due to the unavoidable condensation of water vapor on solid surfaces, these materials undergo fogging under normal operating conditions. More than a mere nuisance, this naturally occurring phenomenon adversely affects their optical performance as it lowers the light-transmitting capability and often gives rise to esthetical, hygienic, and safety concerns. In this context, research in the field of anti-fogging technology has attracted growing interest, particularly in recent years, for numerous potential applications. In this review, recent developments in the design and manufacturing of anti-fogging surfaces are described in detail, beginning with the fogging mechanism in terms of nucleation and growth of water drops. Anti-fogging strategies explored thus far and mainly focusing on hydrophilic and hydrophobic surfaces are then extensively described. Finally, based on current research in this promising field, future trends and prospects for their effective implementation are presented.

关键词： Fog resistant surfaces Theoretical aspects of fogging Water drops Light scattering Anti-fogging strategies

来源：评论

学校读者我要写书评

暂无评论

Freeform Optics design of Primary Lens for Uniform Irradiance Distribution of Concentrator Photovoltaic System 20

Freeform Optics Design of Primary Lens for Uniform Irradianc...

引用

Conference on current developments in Lens design and optical engineering XX

作者： Pham Thanh Tuan Duy, N. N. vu Ngoc Hai Shin, Seoyong Myongji Univ Dept Informat & Commun Engn Gyeonggi Do 17058 South Korea Vietnam Acad Sci & Technol Inst Appl Mat Sci Ho Chi Minh City 70072 Vietnam Phenikaa Univ Elect & Elect Engn Hanoi 1000 Vietnam Duy Tan Univ Fac Nat Sci Danang 550000 Vietnam

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

In this paper, a primary lens of concentrator photovoltaic (CPv) system is designed by using freeform optics. The designed lens is constructed based on a basic idea of a combination of Fresnel lens and freeform optics, in which the lens is divided into an array of sub-lenses, which are designed using the conservation of optical path length and the edge ray theorem to get uniform irradiance distribution over the receiver. In this design, every sub-lens is designed to guide the direct sunlight over the receiver with uniform irradiance so that the whole of the primary lens will converge uniformly the direct sunlight over the receiver. The structure of the lens is designed firstly by using Matlab program for every sublens. The Matlab data of the designed lens structure is then used to build the three-dimensional (3D) lens in LightTools (TM) software. The ray tracing technique in LightTools (TM) software is used to find out the optimum structure of the freeform lens. Furthermore, the simulation is performed to estimate the efficiency of the lens as a concentrator of a CPv system by using the light source with the sunlight spectrum. The designed lens can achieve high geometrical concentration ratio and uniform irradiance distribution over the receiver. The simulation results show that the lens can easily reach a high concentration ratio (494 times) with uniform irradiance distribution and good optical efficiency (86%).

关键词： Concentrator photovoltaic (CPv) Primary lens Freeform optics Sub-lenses array Uniform irradiance distribution

来源：评论

学校读者我要写书评

暂无评论

极紫外光刻光源的研究进展及发展趋势

引用

激光与光电子学进展 2022年第9期59卷 15-34页

作者：林楠杨文河陈韫懿魏鑫王成赵娇玲彭宇杰冷雨欣上海大学微电子学院上海200072 中国科学院上海光学精密机械研究所精密光学工程部(筹) 上海201800

随着芯片特征尺寸的不断减小,借助193 nm准分子光源的浸没式深紫外光刻技术已进入瓶颈,使用多次曝光技术的工艺路线也已到达目前的商用极限。极紫外光刻(EUvL)采用13.5 nm的极紫外光源,被认为是下一代光刻商用化路线必需的技术。综述了... 详细信息

随着芯片特征尺寸的不断减小,借助193 nm准分子光源的浸没式深紫外光刻技术已进入瓶颈,使用多次曝光技术的工艺路线也已到达目前的商用极限。极紫外光刻(EUvL)采用13.5 nm的极紫外光源,被认为是下一代光刻商用化路线必需的技术。综述了激光等离子体13.5 nm EUvL光源的原理和最新进展,分别从驱动光源、靶材、收集镜等关键子系统展开介绍。讨论了激光等离子体光源进一步发展过程中需要解决的问题,如提升激发光功率、提高转换效率及延长光源寿命,特别分析了日本Gigaphoton公司和荷兰ASML公司的EUvL光源装置。

关键词：光学设计极紫外光源激光等离子体液滴锡靶转换效率光源碎屑

来源：评论

学校读者我要写书评

暂无评论

Photothermal materials for efficient solar powered steam generation

引用

Frontiers of Chemical Science and engineering 2019年第4期13卷 636-653页

作者： Fenghua Liu Yijian Lai Binyuan Zhao Robert Bradley Weiping Wu State Key Laboratory of Metal Matrix Composites School o f Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Materials University of OxfordOxfordOX13PHUK MatSurf Technology Ltd. CumbriaCA101NWUK Department of Electrical and Electronic Engineering School of MathematicsComputer Science and EngineeringCityUniversity of LondonNorthampton SquareLondonEC 1V OHBUK

Solar powered steam generation is an emerging area in the field o f energy harvest and sustainable *** nano-structured photothermal materials are able to harvest energy from the full solar spectrum and convert it to heat with high ***,the materials and structures for heat management as well as the mass transportation are also brought to the *** groups have reported their materials and structures as solutions for high performance devices,a few creatively coupled other physical fields with solar energy to achieve even better *** paper provides a systematic review on the recent developments in photothermal nanomaterial discovery,material selection,structural design and mass/heat management,as well as their applications in seawater desalination and fresh water production from waste water with free solar *** also discusses current technical challenges and likely future *** article will help to stimulate novel ideas and new designs for the photothermal materials,towards efficient,low cost practical solar-driven clean water production.

关键词： solar stream generation plasmonics porous carbon photothermal materials solar energy conversion efficiency water vapor generation rate

来源：评论

学校读者我要写书评

暂无评论

D-Egg: a Dual PMT optical Module for the IceCube Upgrade 38

D-Egg: a Dual PMT Optical Module for the IceCube Upgrade

引用

38th International Cosmic Ray Conference, ICRC 2023

作者： Abbasi, R. Ackermann, M. Adams, J. Agarwalla, S.K. Aguilar, J.A. Ahlers, M. Alameddine, J.M. Amin, N.M. Andeen, K. Anton, G. Argüelles, C. Ashida, Y. Athanasiadou, S. Axani, S.N. Bai, X. Balagopal, A.A. Baricevic, M. Barwick, S.W. Basu, v. Bay, R. Beatty, J.J. Becker Tjus, J. Beise, J. Bellenghi, C. Benning, C. BenZvi, S. Berley, D. Bernardini, E. Besson, D.Z. Blaufuss, E. Blot, S. Bontempo, F. Book, J.Y. Boscolo Meneguolo, C. Böser, S. Botner, O. Böttcher, J. Bourbeau, E. Braun, J. Brinson, B. Brostean-Kaiser, J. Burley, R.T. Busse, R.S. Butterfield, D. Campana, M.A. Carloni, K. Carnie-Bronca, E.G. Chattopadhyay, S. Chau, N. Chen, C. Chen, Z. Chirkin, D. Choi, S. Clark, B.A. Classen, L. Coleman, A. Collin, G.H. Connolly, A. Conrad, J.M. Coppin, P. Correa, P. Cowen, D.F. Dave, P. De Clercq, C. DeLaunay, J.J. Delgado, D. Deng, S. Deoskar, K. Desai, A. Desiati, P. de vries, K.D. de Wasseige, G. DeYoung, T. Diaz, A. Díaz-vélez, J.C. Dittmer, M. Domi, A. Dujmovic, H. Duvernois, M.A. Ehrhardt, T. Eller, P. Ellinger, E. El Mentawi, S. Elsässer, D. Engel, R. Erpenbeck, H. Evans, J. Evenson, P.A. Fan, K.L. Fang, K. Farrag, K. Fazely, A.R. Fedynitch, A. Feigl, N. Fiedlschuster, S. Finley, C. Fischer, L. Fox, D. Franckowiak, A. Fritz, A. Fürst, P. Gallagher, J. Ganster, E. Garcia, A. Gerhardt, L. Ghadimi, A. Glaser, C. Glauch, T. Glüsenkamp, T. Goehlke, N. Gonzalez, J.G. Goswami, S. Grant, D. Gray, S.J. Gries, O. Griffin, S. Griswold, S. Groth, K.M. Günther, C. Gutjahr, P. Haack, C. Hallgren, A. Halliday, R. Halve, L. Halzen, F. Hamdaoui, H. Ha Minh, M. Hanson, K. Hardin, J. Harnisch, A.A. Hatch, P. Haungs, A. Helbing, K. Hellrung, J. Henningsen, F. Heuermann, L. Heyer, N. Hickford, S. Hidvegi, A. Hill, C. Hill, G.C. Hoffman, K.D. Hori, S. Hoshina, K. Hou, W. Huber, T. Hultqvist, K. Hünnefeld, M. Hussain, R. Hymon, K. In, S. Ishihara, A. Jacquart, M. Janik, O. Jansson, M. Japaridze, G.S. Jeong, M. III. Physikalisches Institut RWTH Aachen University AachenD-52056 Germany Department of Physics University of Adelaide Adelaide5005 Australia Dept. of Physics and Astronomy University of Alaska Anchorage 3211 Providence Dr. AnchorageAK99508 United States Dept. of Physics University of Texas at Arlington 502 Yates St. Science Hall Rm 108 Box 19059 ArlingtonTX76019 United States CTSPS Clark-Atlanta University AtlantaGA30314 United States School of Physics Center for Relativistic Astrophysics Georgia Institute of Technology AtlantaGA30332 United States Dept. of Physics Southern University Baton RougeLA70813 United States Dept. of Physics University of California BerkeleyCA94720 United States Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Institut für Physik Humboldt-Universität zu Berlin BerlinD-12489 Germany Fakultät für Physik & Astronomie Ruhr-Universität Bochum BochumD-44780 Germany Université Libre de Bruxelles Science Faculty CP230 BrusselsB-1050 Belgium Dienst ELEM BrusselsB-1050 Belgium Department of Physics Laboratory for Particle Physics and Cosmology Harvard University CambridgeMA02138 United States Dept. of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Dept. of Physics The International Center for Hadron Astrophysics Chiba University Chiba263-8522 Japan Department of Physics Loyola University Chicago ChicagoIL60660 United States Dept. of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand Dept. of Physics University of Maryland College ParkMD20742 United States Dept. of Astronomy Ohio State University ColumbusOH43210 United States Dept. of Physics Center for Cosmology and Astro-Particle Physics Ohio State University ColumbusOH43210 United States Niels Bohr Institute University of Copenhagen CopenhagenDK-2100 Denmark Dept. of Physics TU Dortmund University DortmundD-44221 Germany Dept. of Physics and Astro

The D-Egg, a dual PMT optical sensor, is one of the new optical modules designed for the coming IceCube Upgrade at the South Pole. With two 8-inch high-quantum efficiency photomultiplier tubes (PMTs) per module and improvements in overall design, D-Eggs offer an increased effective photodetection sensitivity that is 2.8 times larger than that of the current IceCube optical sensors. Mass production of over 300 D-Eggs has been completed, with all modules now undergoing Final Acceptance Testing (FAT) before deployment in the Antarctic ice. This involves detailed characterisation of each module at cold temperatures to collect valuable calibration data, as well as detect possible hardware related failures. While FAT is still on-going, current results indicate we will exceed the required 277 modules for deployment. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Acceptance tests

来源：评论

学校读者我要写书评

暂无评论

The characteristic of Teledyne e2v CIS 113 CMOS sensors 9

The characteristic of Teledyne e2v CIS 113 CMOS sensors

引用

X-Ray, optical, and Infrared Detectors for Astronomy IX 2020

作者： Wang, Shiang-Yu Ling, Hung-Hsu Wang, Bo-Jhou Geary, John C. Hsu, Shu-Fu Pratlong, Jérôme Lehner, Matthew Jorden, Paul Academia Sinica Institute of Astronomy and Astrophysics P. O. Box 23-141 Taipei Taiwan Harvard-Smithsonian Center for Astrophysics 60 Garden St. CambridgeMA02138 United States Teledyne e2v Waterhouse Lane Chelmsford EssexCM1 2QU United Kingdom

ISBN: (纸本)9781510636958

We report the testing results of the Teledyne e2v CIS 113 CMOS sensor at temperatures from room temperature down to 168K. The CIS 113 sensor is a customized device for the Transneptunian Automatic Occultation Survey (TAOS II) project. The sensor has 1920 × 4608, 16 μm pixels with 8 outputs. The pixels have a 5T design to provide anti-blooming capability with 18 μm thick high resistivity epitaxial silicon. The sensor provides two parallel and eight serial registers so the region of interests can be addressed and rapidly read out separately through different output channels. More than one thousand 8 × 8 star boxes can be sampled at a frame rate higher than 20 Hz. With a package similar to large format Teledyne e2v CCDs, the CIS 113 is three-side buttable. The device shows peak QE about 77% in 500-600 nm, readout noise around 3eand dark current lower than 2 e-/s/pix at -40 °C. The linear full well for the device is higher at lower temperature and it is about 14400 e- at temperature lower than 210K. The device performance meets the science requirements with the operation temperature around 200K for TAOS II. © SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Pixels

来源：评论

学校读者我要写书评

暂无评论

Self-organizing production systems: Implications for product design 12

Self-organizing production systems: Implications for product...

引用

12th CIRP Conference on Intelligent Computation in Manufacturing engineering (CIRP ICME)

作者： Graessler, Iris Hentze, Julian Poehler, Alexander Paderborn Univ Prod Creat Heinz Nixdorf Inst Fuerstenallee 11 D-33102 Paderborn Germany

current developments in production systems and production control will lead to a significant change of their connection to product development. A representative example of these developments is the concept of self-organizing production systems. This paper focuses on appropriate changes of the development process evoked through recent developments in production. The paper summarizes process changes and opportunities for the development process, which include the vision of self-organizing production systems, its challenges and opportunities. Consequences are estimated for established development methodologies like the v-model and aspects of Systems engineering. (C) 2019 The Authors. Published by Elsevier B.v.

关键词： Product development Self-organizing production systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：