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Advanced Optical materials 2020年第21期8卷

作者： Che-Hsuan Cheng Da Seul Yang Jinsang Kim Parag B. Deotare Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48105 USA Macromolecular Science and Engineering University of Michigan Ann Arbor MI 48105 USA Department of Chemical Engineering University of Michigan Ann Arbor MI 48105 USA Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48105 USA

Author Correction: Multidimensional nanoscopic chiroptics

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Nature Reviews Physics

Nature Reviews Physics 2022年 138页

作者： Yang Chen Qing Zhang Cheng-Wei Qiu Wei Du Oscar Ávalos-Ovando Alexander O. Govorov Jing Wu Qing-Hua Xu Na Liu Hiromi Okamoto Qihua Xiong Department of Electrical and Computer Engineering National University of Singapore Singapore Singapore CAS Key Laboratory of Mechanical Behaviour and Design of Materials Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Hefei China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore Singapore Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University Suzhou China Department of Physics and Astronomy Ohio University Athens OH USA Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu China Institute of Materials Research and Engineering (IMRE) Agency for Science Technology and Research (A*STAR) Singapore Singapore Department of Chemistry National University of Singapore Singapore Singapore 2nd Physics Institute University of Stuttgart Stuttgart Germany Max Planck Institute for Solid State Research Stuttgart Germany Institute for Molecular Science and the Graduate University for Advanced Studies (SOKENDAI) Okazaki Aichi Japan State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing China Beijing Academy of Quantum Information Sciences (BAQIS) Beijing China

A mountable toilet system for personalized health monitoring via the analysis of excreta (vol 15, pg 561, 2020)

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NATURE BIOMEDICAL engineering 2020年第6期4卷 662-662页

作者： Park, Seung-min Won, Daeyoun D. Lee, Brian J. Escobedo, Diego Esteva, Andre Aalipour, Amin Ge, T. Jessie Kim, Jung Ha Suh, Susie Choi, Elliot H. Lozano, Alexander X. Yao, Chengyang Bodapati, Sunil Achterberg, Friso B. Kim, Jeesu Park, Hwan Choi, Youngjae Kim, Woo Jin Yu, Jung Ho Bhatt, Alexander M. Lee, Jong Kyun Spitler, Ryan Wang, Shan X. Gambhir, Sanjiv S. Department of Radiology Stanford University School of Medicine Stanford CA USA Molecular Imaging Program at Stanford Stanford University School of Medicine Stanford CA USA Department of Surgery Seoul Song Do Hospital Seoul Republic of Korea Cancer Immunology Laboratory Seoul Song Do Hospital Seoul Republic of Korea Department of Surgery Leiden University Medical Center Leiden the Netherlands Department of Creative IT Engineering Pohang University of Science and Technology (POSTECH) Pohang Republic of Korea Precision Health and Integrated Diagnostic Center (PHIND) Stanford University School of Medicine Palo Alto CA USA Department of Materials Science and Engineering Stanford University Stanford CA USA Department of Bioengineering Stanford University Stanford CA USA Canary Center at Stanford for Cancer Early Detection Stanford University School of Medicine Palo Alto CA USA Salesforce Research Palo Alto CA USA Department of Urology Stanford University School of Medicine Stanford CA USA Department of Pharmacology Case Western Reserve University School of Medicine Cleveland OH USA Faculty of Medicine University of Toronto Toronto Ontario Canada Department of Electrical Engineering Stanford University Stanford CA USA College of Medicine The Catholic University of Korea Seoul Republic of Korea

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

关键词： Diagnosis

The application of an extracellular vesicle-based biosensor in early diagnosis and prediction of chemoresponsiveness in ovarian cancer

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Cancer Letters 2024年 581卷 216533-216533页

作者： Tsang, Benjamin K. Asare-Werehene, Meshach Hunter, Rob Gerber, Emma Reunov, Arkadiy Brine, Isaiah Chang, Chia-Yu Chang, Chia-Ching Shieh, Dar-Bin Burger, Dylan Anis, Hanan Departments of Obstetrics & Gynecology and Cellular & Molecular Medicine Centre for Infection Immunity and Inflammation Interdisciplinary School of Health Sciences University of Ottawa Ottawa ON K1N 6N5 Canada Chronic Disease Program Ottawa Hospital Research Institute The Ottawa Hospital Ottawa ON K1Y 4E9 Canada Department of Biology St. Francis Xavier University 2320 Notre Dame Avenue Antigonish NS B2G 2W5 Canada School of Electrical Engineering and Computer Science Ottawa-Carleton Institute for Biomedical Engineering University of Ottawa Ottawa ON K1N 6N5 Canada Department of Biological Science and Department of Electrophysics Technology Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B) National Yang Ming Chiao Tung University Hsinchu 30068 Taiwan Institute of Basic Medical Science Institute of Oral Medicine and Department of Stomatology Advanced Optoelectronic Technology Center and Center for Micro/Nano Science and Technology National Cheng Kung University Hospital National Cheng Kung University Tainan 704 Taiwan Institute of Physics Academia Sinica Taipei 10529 Taiwan

Erratum to: The formation mechanism of aqueous hydrogen peroxide in a plasma-liquid system with liquid as the anode

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The European Physical Journal D 2020年第7期74卷 1-2页

作者： Lin, Jiao He, Xinyi Chen, Qiang Xiong, Qing Li, Junshuai Wang, Xin Chen, Guolong Liu, Qing Huo Ostrikov, Kostya (Ken) Institute of Electromagnetics and Acoustics Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Department of Electronic Science Xiamen University Xiamen P.R. China State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing P.R. China Key Laboratory of Special Function Materials & Structure Design of the Ministry of Education School of Physical Science & Technology Lanzhou University Lanzhou P.R. China Department of Electrical and Computer Engineering Duke University Durham USA Institute for Future Environments and School of Chemistry Physics and Mechanical Engineering Queensland University of Technology Brisbane Australia CSIRO-QUT Joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organization Lindfield Australia

We find that we made a mistake in the estimation of the H2O2 concentration by the colorimetric method in our previous paper (J. Lin et al., Eur. Phys. J. D (2020) 74: 80) [1].

关键词： Atomic and Molecular Collisions

Four-phonon scattering diminishes the optical phonon contribution and isotope effect to thermal conductivity of III-V semiconductors

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arXiv 2019年

作者： Yang, Xiaolong Feng, Tianli Li, Ju Ruan, Xiulin School of Mechanical Engineering Birck Nanotechnology Center Purdue University West LafayetteIN47907-2088 United States Institute for Advanced Study Shenzhen University Nanhai Avenue 3688 Shenzhen518060 China Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an710049 China Department of Physics and Astronomy Department of Electrical Engineering and Computer Science Vanderbilt University NashvilleTN37235 United States Materials Science and Technology Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Department of Nuclear Science and Engineering Department of Materials Science and Engineering Massachusetts Institute of Technology CambridgeMA02139 United States

Recent studies reveal that four-phonon scattering is generally important in determining thermal conductivities of solids. However, these studies have been focused on materials where thermal conductivity κ is dominated by acoustic phonons, and the impact of four phonon scattering, although significant, is still generally smaller than three-phonon scattering. In this work, taking AlSb as example, we demonstrated that four-phonon scattering is even more critical to three-phonon scattering as it diminishes optical phonon thermal transport, and therefore significantly reduces the thermal conductivities of materials in which optical branches have long three-phonon lifetimes. Also, our calculations show that four-phonon scattering can play an extremely important role in weakening the isotope effect on κ. Specifically, four-phonon scattering reduces the room-temperature κ of the isotopically pure and natural-occurring AlSb by 70% and 50%, respectively. The reduction for isotopically pure and natural-occurring c-GaN is about 34% and 27%, respectively. For isotopically-pure w-GaN, the reduction is about 13% at room temperature and 25% at 400 K. These results provided important guidance for experimentalists for achieving high thermal conductivities in III-V compounds for applications in semiconductor industry. Copyright © 2019, The Authors. All rights reserved.

关键词： III-V semiconductors

Reconfigurable all-dielectric metalens with diffraction-limited performance

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arXiv 2019年

作者： Shalaginov, Mikhail Y. An, Sensong Zhang, Yifei Yang, Fan Su, Peter Liberman, Vladimir Chou, Jeffrey B. Roberts, Christopher M. Kang, Myungkoo Rios, Carlos Du, Qingyang Fowler, Clayton Agarwal, Anuradha Richardson, Kathleen Rivero-Baleine, Clara Zhang, Hualiang Hu, Juejun Gu, Tian Department of Materials Science & Engineering Massachusetts Institute of Technology CambridgeMA United States Department of Electrical & Computer Engineering University of Massachusetts Lowell LowellMA United States Lincoln Laboratory Massachusetts Institute of Technology LexingtonMA United States The College of Optics & Photonics Department of Materials Science and Engineering University of Central Florida OrlandoFL United States Materials Research Laboratory Massachusetts Institute of Technology CambridgeMA United States Missiles and Fire Control Lockheed Martin Corporation OrlandoFL United States

Active metasurfaces, whose optical properties can be modulated post-fabrication, have emerged as an intensively explored field in recent years. The efforts to date, however, still face major performance limitations in tuning range, optical quality, and efficiency especially for non-mechanical actuation mechanisms. In this paper, we introduce an active metasurface platform combining phase tuning covering the full 2π range and diffraction-limited performance using an all-dielectric, low-loss architecture based on optical phase change materials (O-PCMs). We present a generic design principle enabling switching of metasurfaces between two arbitrary phase profiles and propose a new figure-of-merit (FOM) tailored for active meta-optics. We implement the approach to realize a high-performance varifocal metalens operating at 5.2 μm wavelength. The metalens is constructed using Ge2Sb2Se4Te1(GSST), an O-PCM with a large refractive index contrast (Δn > 1) and unique broadband low-loss characteristics in both amorphous and crystalline states. The reconfigurable metalens features focusing efficiencies above 20% at both states for linearly polarized light and a record large switching contrast ratio of 29.5 dB. We further validated aberration-free imaging using the metalens at both optical states, which represents the first experimental demonstration of a non-mechanical active metalens with diffraction-limited performance. Copyright © 2019, The Authors. All rights reserved.

关键词： Phase change materials

Thermal generation, manipulation and detection of skyrmions

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arXiv 2020年

作者： Wang, Zidong Guo, Minghua Zhou, Heng-An Zhao, Le Xu, Teng Tomasello, Riccardo Bai, Hao Dong, Yiqing Je, Soong Geun Chao, Weilun Han, Hee-Sung Lee, Suseok Lee, Ki-Suk Yao, Yunyan Han, Wei Song, Cheng Wu, Huaqiang Carpentieri, Mario Finocchio, Giovanni Im, Mi-Young Lin, Shi-Zeng Jiang, Wanjun State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China Frontier Science Center for Quantum Information Tsinghua University Beijing100084 China Institute of Microelectronics Tsinghua University Beijing100084 China Institute of Applied and Computational Mathematics FORTH Heraklion-CreteGR-70013 Greece Center for X-ray Optics Advanced Light Source Lawrence Berkeley National Laboratory Cyclotron Road BerkeleyCA94720 United States Department of Physics Chonnam National University Gwangju61186 Korea Republic of School of Materials Science and Engineering Ulsan National Institute of Science and Technology Ulsan44919 Korea Republic of Daegu Gyeongbuk Institute of Science and Technology Daegu711-873 Korea Republic of International Center for Quantum Materials School of Physics Peking University Beijing100871 China School of Materials Science and Engineering Tsinghua University Beijing100084 China Department of Electrical and Information Engineering Polytechnic of Bari Bari70125 Italy Department of Mathematical and Computer Sciences Physical Sciences and Earth Sciences University of Messina Messina98166 Italy Theoretical Division T-4 and CNLS Los Alamos National Laboratory Los AlamosNM87545 United States

Recent years have witnessed significant progresses in realizing skyrmions in chiral magnets1-4 and asymmetric magnetic multilayers5-13, as well as their electrical manipulation2,7,8,10. Equally important, thermal generation, manipulation and detection of skyrmions can be exploited for prototypical new architecture with integrated computation14 and energy harvesting15. It has yet to verify if skyrmions can be purely generated by heating16,17, and if their resultant direction of motion driven by temperature gradients follows the diffusion or, oppositely, the magnonic spin torque17-21. Here, we address these important issues in microstructured devices made of multilayers - [Ta/CoFeB/MgO]15, [Pt/CoFeB/MgO/Ta]15 and [Pt/Co/Ta]15 integrated with on-chip heaters, by using a full-field soft X-ray microscopy. The thermal generation of densely packed skyrmions is attributed to the low energy barrier at the device edge, together with the thermally induced morphological transition from stripe domains to skyrmions. The unidirectional diffusion of skyrmions from the hot region towards the cold region is experimentally observed. It can be theoretically explained by the combined contribution from repulsive forces between skyrmions, and thermal spin-orbit torques in competing with magnonic spin torques17,18,20,21 and entropic forces22. These thermally generated skyrmions can be further electrically detected by measuring the accompanied anomalous Nernst voltages23. The on-chip thermoelectric generation, manipulation and detection of skyrmions could open another exciting avenue for enabling skyrmionics, and promote interdisciplinary studies among spin caloritronics15, magnonics24 and skyrmionics3,4,12. Copyright © 2020, The Authors. All rights reserved.

关键词： Energy harvesting

Frequency-Resolved Optical Gating Recovery via Smoothing Gradient

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arXiv 2019年

作者： Pinilla, Samuel Bendory, Tamir Eldar, Yonina C. Arguello, Henry Department of Electrical Engineering Universidad Industrial de Santander BucaramangaSantander680002 Colombia Program in Applied and Computational Mathematics Princeton University PrincetonNJ United States Weizmann Institute of Science Rehovot7610001 Israel Department of Computer Science Universidad Industrial de Santander BucaramangaSantander680002 Colombia

Frequency-resolved optical gating (FROG) is a popular technique for complete characterization of ultrashort laser pulses. The acquired data in FROG, called FROG trace, is the Fourier magnitude of the product of the unknown pulse with a time-shifted version of itself, for several different shifts. To estimate the pulse from the FROG trace, we propose an algorithm that minimizes a smoothed non-convex least-squares objective function. The method consists of two steps. First, we approximate the pulse by an iterative spectral algorithm. Then, the attained initialization is refined based upon a sequence of block stochastic gradient iterations. The algorithm is theoretically simple, numerically scalable, and easy-to-implement. Empirically, our approach outperforms the state-of-the-art when the FROG trace is incomplete, that is, when only few shifts are recorded. Simulations also suggest that the proposed algorithm exhibits similar computational cost compared to a state-of-the-art technique for both complete and incomplete data. In addition, we prove that in the vicinity of the true solution, the algorithm converges to a critical point. A Matlab implementation is publicly available at https://***/samuelpinilla/FROG. Copyright © 2019, The Authors. All rights reserved.

关键词： Ultrashort pulses

Flat bands in small angle twisted bilayer WSe2

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arXiv 2019年

作者： Zhang, Zhiming Wang, Yimeng Watanabe, Kenji Taniguchi, Takashi Ueno, Keiji Tutuc, Emanuel LeRoy, Brian J. Physics Department University of Arizona TucsonAZ United States Mircroelectronics Research Center Department of Electrical and Computer Engineering University of Texas at Austin AustinTX78758 United States National Institute for Materials Science Namiki 1-1 Tsukuba Ibaraki305-0044 Japan Department of Chemistry Graduate School of Science and Engineering Saitama University Saitama338-8570 Japan

The crystal structure of a material creates a periodic potential that electrons move through giving rise to the electronic band structure of the material. When two-dimensional materials are stacked, the twist angle between the layers becomes an additional degree freedom for the resulting heterostructure. As this angle changes, the electronic band structure is modified leading to the possibility of flat bands with localized states and enhanced electronic correlations1–6. In transition metal dichalcogenides, flat bands have been theoretically predicted to occur over a range of twist angles below ~7 degrees4. Here we show the existence of a flat band in the electronic structure of a 3° twisted bilayer WSe2 sample using scanning tunneling spectroscopy. Direct spatial mapping of wavefunctions at the flat band energy have shown that the flat band is localized in the form of a hexagonal network in excellent agreement with first-principle density functional theory calculations4. Copyright © 2019, The Authors. All rights reserved.

关键词： Electronic structure