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Highly excited exciton-polariton condensates

Physical Review B 2017年第24期95卷 245122-245122页

作者： Tomoyuki Horikiri Tim Byrnes Kenichiro Kusudo Natsuko Ishida Yasuhiro Matsuo Yutaka Shikano Andreas Löffler Sven Höfling Alfred Forchel Yoshihisa Yamamoto Yokohama National University Tokiwadai 79-5 Hodogaya-ku Yokohama Kanagawa 240-8501 Japan National Institute of Informatics Hitotsubashi 2-1-2 Chiyoda-ku Tokyo 101-8430 Japan E. L. Ginzton Laboratory Stanford University Stanford California 94305 USA The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Center for Emergent Matter Science RIKEN 2-1 Hirosawa Wakoshi Saitama 351-0198 Japan State Key Laboratory of Precision Spectroscopy School of Physical and Material Sciences East China Normal University Shanghai 200062 China NYU-ECNU Institute of Physics at NYU Shanghai 3663 Zhongshan Road North Shanghai 200062 China New York University Shanghai 1555 Century Avenue Pudong Shanghai 200122 China Department of Physics New York University New York New York 10003 USA Research Center of Integrative Molecular Systems Institute for Molecular Science 38 Nishigo-Naka Myodaiji Okazaki 444-8585 Japan Institute for Quantum Studies Chapman University 1 University Drive Orange California 92866 USA Materials and Structures Laboratory Tokyo Institute of Technology 4259 Nagatsuta Midori Yokohama 226-8503 Japan Research Center for Advanced Science and Technology (RCAST) The University of Tokyo 4-6-1 Komaba Meguro-ku Tokyo 153-8904 Japan Technische Physik Universität Würzburg Am Hubland D-97074 Würzburg Germany SUPA School of Physics and Astronomy University of St. Andrews St. Andrews KY16 9SS United Kingdom ImPACT Program Japan Science and Technology Agency 7 Gobancho Chiyoda-ku Tokyo 102-0076 Japan

Exciton polaritons are a coherent electron-hole-photon (e-h-p) system where condensation has been observed in semiconductor microcavities. In contrast to equilibrium Bose-Einstein condensation (BECs) for long lifetime systems, polariton condensates have a dynamical nonequilibrium feature owing to the similar physical structure that they have to semiconductor lasers. One of the distinguishing features of a condensate to a laser is the presence of strong coupling between the matter and photon fields. Irrespective of its equilibrium or nonequilibrium nature, exciton polaritons have been observed to maintain strong coupling. We show that by investigating the high-density regime of exciton-polariton condensates, the negative branch is directly observed in photoluminescence. This is evidence that the present e-h-p system is still in the strong-coupling regime, contrary to past results where the system reduced to standard lasing at high density.

关键词： Exciton polariton Excitons Quantum phase transitions Quasiparticles & collective excitations Quantum wells Semiconductor microcavities Photoluminescence

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Design and bolometer characterization of the SPT-3G first-year focal plane

arXiv

引用

arXiv 2019年

作者： Everett, W. Ade, P.A.R. Ahmed, Z. Anderson, A.J. Austermann, J.E. Avva, J.S. Basu Thakur, R. Bender, A.N. Benson, B.A. Carlstrom, J.E. Carter, F.W. Cecil, T. Chang, C.L. Cliche, J.F. Cukierman, A. Denison, E.V. de Haan, T. Ding, J. Dobbs, M.A. Dutcher, D. Foster, A. Gannon, R.N. Gilbert, A. Groh, J.C. Halverson, N.W. Harke-Hosemann, A.H. Harrington, N.L. Henning, J.W. Hilton, G.C. Holzapfel, W.L. Huang, N. Irwin, K.D. Jeong, O.B. Jonas, M. Khaire, T. Kofman, A.M. Korman, M. Kubik, D. Kuhlmann, S. Kuo, C.L. Lee, A.T. Lowitz, A.E. Meyer, S.S. Michalik, D. Montgomery, J. Nadolski, A. Natoli, T. Nguyen, H. Noble, G.I. Novosad, V. Padin, S. Pan, Z. Pearson, J. Posada, C.M. Rahlin, A. Ruhl, J.E. Saunders, L.J. Sayre, J.T. Shirley, I. Shirokoff, E. Smecher, G. Sobrin, J.A. Stark, A.A. Story, K.T. Suzuki, A. Tang, Q.Y. Thompson, K.L. Tucker, C. Vale, L.R. Vanderlinde, K. Vieira, J.D. Wang, G. Whitehorn, N. Yefremenko, V. Yoon, K.W. Young, M.R. CASA Dept. of Astrophysical and Planetary Sciences Univ. of Colorado BoulderCO80309 · United States School of Physics and Astronomy Cardiff Univ. CardiffCF24 3YB United Kingdom Kavli Institute for Particle Astrophysics and Cosmology Stanford Univ. 452 Lomita Mall StanfordCA94305 · United States Dept. of Physics Stanford Univ. 382 Via Pueblo Mall StanfordCA94305 · United States SLAC National Accelerator Laboratory 2575 Sand Hill Rd. Menlo ParkCA94025 United States Fermi National Accelerator Laboratory MS209 P.O. Box 500 BataviaIL60510-0500 · United States Kavli Institute for Cosmological Physics Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL60637 · United States National Institute of Standards and Technology 325 Broadway BoulderCO80305 · United States Dept. of Physics Univ. of California BerkeleyCA94720 · United States Argonne National Laboratory High-Energy Physics Division 9700 S. Cass Ave. ArgonneIL60439 · United States Dept. of Astronomy and Astrophysics Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL60637 · United States Enrico Fermi Institute Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL60637 · United States Dept. of Physics Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL60637 · United States Dept. of Physics McGill Univ. 3600 Rue University MontrealQCH3A 2T8 Canada Argonne National Laboratory Material Science Division 9700 S. Cass Ave. ArgonneIL60439 · United States Canadian Institute for Advanced Research CIFAR Program in Cosmology and Gravity TorontoONM5G 1Z8 Canada Physics Dept. Case Western Reserve Univ. ClevelandOH44106 · United States Dept. of Physics Univ. of Colorado BoulderCO80309 · United States Astronomy Dept. Univ. of Illinois 1002 W. Green St. UrbanaIL61801 · United States Dept. of Physics Univ. of Illinois 1110 W. Green St. UrbanaIL61801 · United States Physics Division Lawrence Berkeley National Laboratory BerkeleyCA94720 · United States Univ. of Chicago 5640 S. Ellis Ave. Chicago

During the austral summer of 2016-17, the third-generation camera, SPT-3G, was installed on the South Pole Telescope, increasing the detector count in the focal plane by an order of magnitude relative to the previous generation. Designed to map the polarization of the cosmic microwave background, SPT-3G contains ten 6"-hexagonal modules of detectors, each with 269 trichroic and dual-polarization pixels, read out using 68x frequency-domain multiplexing. Here we discuss design, assembly, and layout of the modules, as well as early performance characterization of the first-year array, including yield and detector properties. Copyright © 2019, The Authors. All rights reserved.

关键词： Cosmology

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Frequency Distribution of Natural and Anthropogenic Radionuclides in Surface Beach Sand Samples from Sakom Beach in Songkhla Province (Thailand) After the Fukushima Dai-ichi Nuclear Power Plant Accident in Japan

Frequency Distribution of Natural and Anthropogenic Radionuc...

引用

International Conference on science and technology

作者： Prasong Kessaratikoon Nikom Choosiri Ruthairat Boonkrongcheep Murnee Daoh Suchin Udomsomporn Nuclear and Material Physics Research Unit (NuMPRU) Department of Physics Faculty of Science Thaksin University Songkhla Campus Program of Physics and General Science Faculty of Science and Technology Songkhla Rajabhat University Office of Atoms for Peace (OAP)

ISBN: (纸本)9781467376716

The frequency distribution of specific activities of natural (~(40)K, ~(226)Ra and ~(232)Th) and anthropogenic (~(137)Cs) radionuclides in 50 surface beach sand samples collected from Sakom beach in Thepha district Songkhla province (Thailand), have been studied and analyzed after the Fukushima Nuclear Power Plant Accident in Japan. It was found that the frequency distribution of specific activities of ~(40)K, ~(226)Ra, ~(232)Th and ~(137)Cs for Sakom beach was asymmetrical distribution with the skewness of 0.13, 1.20, 2.00 and 1.49, respectively. The median values of ~(40)K, ~(226)Ra, ~(232)Th and ~(137)Cs were 1028.92 ± 130.68 Bq/kg, 31.53 ± 3.18 Bq/kg, 24.98 ± 2.00 Bq/kg and 2.32 ± 0.69 Bq/kg. Furthermore, the median values of specific activities of ~(40)K, ~(226)Ra and ~(232)Th were also used to evaluate four radiological hazard indices which are gamma absorbed dose rate (D), radium equivalent activity (Ra_(eq)), external hazard index (H_(ex)) and annual external effective dose rate (AED_(out)) for the study area. The results were also compared with the Office of Atoms for Peace (OAP) annual report data, Thailand and global radioactivity measurement and evaluations. Moreover, the radioactive contour maps of the investigated area were also created and presented in this paper.

关键词： Frequency distribution Natural and anthro-pogenic radionuclides Radiological hazard index Radioactive contour map Frequency distribution nuclear power plant incidents beach Fukushima Nuclear Accident SPECIFIC ACTIVITY RADIOMETRY Radionuclides

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Highly excited exciton-polariton condensates

arXiv

引用

arXiv 2017年

作者： Horikiri, Tomoyuki Byrnes, Tim Kusudo, Kenichiro Ishida, Natsuko Matsuo, Yasuhiro Shikano, Yutaka Löffler, Andreas Höfling, Sven Forchel, Alfred Yamamoto, Yoshihisa Yokohama National University Tokiwadai 79-5 Hodogaya-ku Yokohaa Kanagawa240-8501 Japan National Institute of Informatics Hitotsubashi 2-1-2 Chiyoda-ku Tokyo101-8430 Japan E. L. Ginzton Laboratory Stanford university StanfordCA94305 United States University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Center for Emergent Matter Science RIKEN 2-1 Hirosawa Wakoshi Saitama351-0198 Japan State Key Laboratory of Precision Spectroscopy School of Physical and Material Sciences East China Normal University Shanghai200062 China NYU-ECNU Institute of Physics at NYU Shanghai 3663 Zhongshan Road North Shanghai200062 China National Institute of Informatics 2-1-2 Hitotsubashi Chiyoda-ku Tokyo101-8430 Japan New York University Shanghai 1555 Century Ave PudongShanghai200122 China Department of Physics New York University New YorkNY10003 United States Research Center of Integrative Molecular Systems Institute for Molecular Science 38 Nishigo-Naka Myodaiji Okazaki444-8585 Japan Institute for Quantum Studies Chapman University 1 University Dr. OrangeCA92866 United States Materials and Structures Laboratory Tokyo Institute of Technology 4259 Nagatsuta Midori Yokohama226-8503 Japan University of Tokyo 4-6-1 Komaba Meguro-ku Tokyo153-8904 Japan Technische Physik Universität Würzburg Am Hubland WürzburgD-97074 Germany SUPA Schoold of Physics and Astronomy University of St Andrews KY16 9SS United Kingdom ImPACT Program Japan Science and Technology Agency 7 Gobancho Chiyoda-ku Tokyo102-0076 Japan

Exciton-polaritons are a coherent electron-hole-photon (e-h-p) system where condensation has been observed in semiconductor microcavities. In contrast to equilibrium Bose-Einstein condensation (BEC) for long lifetime systems, polariton condensates have a dynamical nonequilibrium feature owing to the similar physical structure that they have to semiconductor lasers. One of the distinguishing features of a condensate to a laser is the presence of strong coupling between the matter and photon fields. Irrespective of its equilibrium or nonequilibrium nature, exciton-polariton have been observed to maintain strong coupling. We show that by investigating high density regime of exciton-polariton condensates, the negative branch directly observed in photoluminescence. This is evidence that the present e-h-p system is still in the strong coupling regime, contrary to past results where the system reduced to standard lasing at high density. Copyright © 2017, The Authors. All rights reserved.

关键词： Photons

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Can we manufacture diagnostic test strips using an Inkjet printer?

Can we manufacture diagnostic test strips using an Inkjet pr...

引用

IEEE Global Humanitarian technology Conference (GHTC)

作者： Nicholas Frazzette Jennifer Dobson Arwa Mukhtar Bridget Burt Janak Jethva James Adair Khanjan Mehta Humanitarian Engineering and Social Entrepreneurship (HESE) Program School of Engineering Design Technology and Professional Programs Department of Material Science and Engineering The Pennsylvania State University University Park PA USA

Developing countries face an increasing double disease burden of chronic health conditions like cancer, cardiovascular disease, and diabetes alongside traditional communicable diseases like tuberculosis, HIV/AIDS, and malaria. Rural patients often cannot afford to visit established medical centers because of the cost or time associated with travel. Poor education and social stigma prevent patients from seeking medical attention or getting tested for curable illnesses. Access to affordable and accessible tools for screening and diagnosis of common illnesses can greatly reduce the strain on fledgling health care systems. This article provides a proof-of-concept for manufacturing dipstick test strips that can be used for a variety of screening tests including diabetes and urinary tract infections. By repurposing a traditional, piezo inkjet printer with chemically active solutions that match the fluid properties of traditional printer ink, test strips can be printed in a just-in-time manner in low-resource settings.

关键词： Ink Decision support systems Printing Strips Diseases Conferences

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High-Performance Snsb Nanostructured Electrode Assembly for Lithium-Ion Batteries

引用

ECS Meeting Abstracts 2016年第2期MA2016-03卷

作者： Qianlei Jiang Mengqiu Jia Daozhong Hu Yuhong Jin Yujuan Zhao Changwei Ji Guyue New Material Research Institute College of Materials Science and Engineering Beijing University of Chemical Technology National 863 Program Power Battery Test Base China North Vehicle Research Institute College of Environmental and Energy Engineering

Lithium-ion batteries as a new clean energy with high specific energy and excellent cycle performance and long life serve widely as the power source for many portable electronic devices. However, their power and energy densities need to be further increased particularly for the application in electric vehicles. It is important to develop high capacity anode materials to increase the energy density of lithium-ion batteries as the anode material is one of the key factors affect the performance of lithium-ion batteries. SnSb intermetallic alloys are attractive materials as a potential substitute for the conventional graphite anode because their theoretical capacity of SnSb alloys has been estimated to be superior to that of graphite. However, its practical use is hampered by their large volume change during alloying and de-alloying reaction with Li+, as the continuous volume change during cycling will cause the mechanical pulverization resulting in poor cyclability and cracking of the electrode. Various strategies have been brought forward to improve the cycling stability, for example, preparing thin film materials or nanostructured materials. nanostructured alloy anodes have shown an improved cycle lifetime because nanostructured alloy anodes can accommodate the large volume change and maintain the structural integrity of the electrode during the lithiation/de-lithiation process. In this paper, a nanostructured SnSb anode for Li-ion battery has been prepared by a two-step electrode design consisting of the electrochemically assisted template growth of Cu nanopillars onto a current collector followed by electrochemical plating of SnSb, there among, Cu nanopillars current collector was obtained by P. Simon's method. We try to take advantage of the nanostructuration of our electrodes to buffer the mechanical strains occurring during the cycling of tin and antimony with Li+, thanks to larger free space available for alloy–dealloying reactions, delivers a high cycle life a

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Study of THz emission from ring-Airy beam induced plasma

Study of THz emission from ring-Airy beam induced plasma

引用

International Conference on Infrared and Millimeter Waves

作者： Kang Liu D. G. Papazoglou A. D. Koulouklidis S. Tzortzakis X.-C. Zhang The Institute of Optics University of Rochester Rochester USA Department of Material Science and Technology University of Crete Heraklion Greece Institute of Electronic Structure and Laser Foundation for Research and Technology Heraklion Greece Science Program Texas A&M University at Qatar Doha Qatar

ISBN: (纸本)9781479982738

We experimentally investigated the THz emission from two-color ring-Airy beam induced plasma in the ambient air. The results show that this exotic autofocusing beam tends to form an elongated weak filamentation with a main peak at the front and a `tail' with certain oscillations following, which leads to a higher THz yield and a slightly narrower THz spectrum than the emission from a Gaussian beam plasma under the same circumstances.

关键词： Laser beams Particle beams Plasmas Lenses Measurement by laser beam Fluorescence

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Growth mechanism of Co:TiO2 thin film deposited by metal organic chemical vapor deposition technique

引用

IOP Conference Series: materials science and Engineering 2016年第1期128卷

作者： A Saripudin P Arifin Study Program of Electrical Engineering Dept. of Electrical Engineering Education Faculty of Technology and Vocational Universitas Pendidikan Indonesia Jl. Dr. Setiabudi 207 Bandung 40154 West Java Indonesia Physics of Electronics Material Lab. Study Program of Physics Faculty of Mathematics and Natural Science Institut Teknologi Bandung Jl. Ganeca 10 Bandung 40132 West Java Indonesia

In this research, we investigated the growth mechanism of cobalt-doped titanium dioxide (Co:TiO2) films. Thi Co:TiO2 thin films were grown on the n-type silicon substrate. The films were grown by metal organic chemical vapor deposition method. The growth temperature was varied of 325°C – 450°C. The films were characterized by SEM. Using Arheniu's equation, it is known that the activation energy value of film growth is positive in the range of temperature of 325°C – 400°C and negative in the range of temperature of 400°C – 450°C. These results show that the decomposition rate in the range of temperature of 325°C – 400°C is due to diffusion phase of precursor gas. On the other hand, the decomposition rate decreased in the range of temperature of 400°C – 450°C because the precursor gas decreased, and the surface chemical reaction was high.

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Optical Characterization of the SPT-3G Focal Plane

arXiv

引用

arXiv 2018年

作者： Pan, Z. Ade, P.A.R. Ahmed, Z. Anderson, A.J. Austermann, J.E. Avva, J.S. Basu Thakur, R. Bender, A.N. Benson, B.A. Carlstrom, J.E. Carter, F.W. Cecil, T. Chang, C.L. Cliche, J.F. Cukierman, A. Denison, E.V. de Haan, T. Ding, J. Dobbs, M.A. Dutcher, D. Everett, W. Foster, A. Gannon, R.N. Gilbert, A. Groh, J.C. Halverson, N.W. Harke-Hosemann, A.H. Harrington, N.L. Henning, J.W. Hilton, G.C. Holzapfel, W.L. Huang, N. Irwin, K.D. Jeong, O.B. Jonas, M. Khaire, T. Kofman, A.M. Korman, M. Kubik, D. Kuhlmann, S. Kuo, C.L. Lee, A.T. Lowitz, A.E. Meyer, S.S. Michalik, D. Montgomery, J. Nadolski, A. Natoli, T. Nguyen, H. Noble, G.I. Novosad, V. Padin, S. Pearson, J. Posada, C.M. Rahlin, A. Ruhl, J.E. Saunders, L.J. Sayre, J.T. Shirley, I. Shirokoff, E. Smecher, G. Sobrin, J.A. Stark, A.A. Story, K.T. Suzuki, A. Tang, Q.Y. Thompson, K.L. Tucker, C. Vale, L.R. Vanderlinde, K. Vieira, J.D. Wang, G. Whitehorn, N. Yefremenko, V. Yoon, K.W. Young, M.R. School of Physics and Astronomy Cardiff Univ. CardiffCF24 3YB United Kingdom Kavli Institute for Particle Astrophysics and Cosmology Stanford Univ. 452 Lomita Mall StanfordCA94305 · United States Dept. of Physics Stanford Univ. 382 Via Pueblo Mall StanfordCA94305 · United States SLAC National Accelerator Laboratory 2575 Sand Hill Rd. Menlo ParkCA94025 · United States Fermi National Accelerator Laboratory MS209 P.O. Box 500 BataviaIL60510-0500 · United States Kavli Institute for Cosmological Physics Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL60637 · United States National Institute of Standards and Technology 325 Broadway BoulderCO80305 · United States Dept. of Physics Univ. of California BerkeleyCA94720 · United States Argonne National Laboratory High-Energy Physics Division 9700 S. Cass Ave. ArgonneIL60439 · United States Dept. of Astronomy and Astrophysics Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL60637 · United States Enrico Fermi Institute Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL60637 · United States Dept. of Physics Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL60637 · United States Dept. of Physics McGill Univ. 3600 Rue University MontrealQCH3A 2T8 Canada Argonne National Laboratory Material Science Division 9700 S. Cass Ave. ArgonneIL60439 · United States Canadian Institute for Advanced Research CIFAR Program in Cosmology and Gravity TorontoONM5G 1Z8 Canada CASA Dept. of Astrophysical and Planetary Sciences Univ. of Colorado BoulderCO80309 · United States Physics Dept. Case Western Reserve Univ. ClevelandOH44106 · United States Dept. of Physics Univ. of Colorado BoulderCO80309 United States Astronomy Dept Univ. of Illinois 1002 W. Green St. UrbanaIL61801 United States Dept. of Physics Univ. of Illinois 1110 W. Green St. UrbanaIL61801 · United States Physics Division Lawrence Berkeley National Laboratory BerkeleyCA94720 · United States Univ. of Chicago 5640 S. Ellis Ave. ChicagoIL

The third-generation South Pole Telescope camera is designed to measure the cosmic microwave background across three frequency bands (95, 150 and 220 GHz) with ∼16,000 transition-edge sensor (TES) bolometers. Each multichroic pixel on a detectorwafer has a broadband sinuous antenna that couples power to six TESs, one for each of the three observing bands and both polarization directions, via lumped element filters. Ten detector wafers populate the focal plane, which is coupled to the sky via a large-aperture optical system. Here we present the frequency band characterization with Fourier transform spectroscopy, measurements of optical time constants, beam properties, and optical and polarization efficiencies of the focal plane. The detectors have frequency bands consistent with our simulations, and have high average optical efficiency which is 86%, 77% and 66% for the 95, 150 and 220 GHz detectors. The time constants of the detectors are mostly between 0.5 ms and 5 ms. The beam is round with the correct size, and the polarization efficiency is more than 90% for most of the bolometers. Copyright © 2018, The Authors. All rights reserved.

关键词： Polarization

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Corrigendum to "Combination therapy with lenalidomide and nanoceria ameliorates CNS autoimmunity", [Exp. Neurol. 273 (2015), 151-160]

引用

Experimental neurology 2016年 280卷 121页

作者： Erez Eitan Emmette R Hutchison Nigel H Greig David Tweedie Hasan Celik Soumita Ghosh Kenneth W Fishbein Richard G Spencer Carl Y Sasaki Paritosh Ghosh Soumen Das Susheela Chigurapati James Raymick Sumit Sarkar Srinivasulu Chigurupati Sudipta Seal Mark P Mattson Laboratory of Neurosciences National Institute on Aging Intramural Research Program Baltimore MD 21224 USA. Translational Gerontology Branch National Institute on Aging Intramural Research Program Baltimore MD 21224 USA. Laboratory of Clinical Investigation National Institute on Aging Intramural Research Program Baltimore MD 21224 USA. Laboratory of Immunology National Institute on Aging Intramural Research Program Baltimore MD 21224 USA. Material Science and Engineering College of Medicine University of Central Florida Orlando FL 32816 USA. Arkansas Regional Laboratory Office of Regulatory Affairs U.S. Food and Drug Administration 3900 NCTR Road Building 26 Jefferson AR 72079 USA. Division of Neurotoxicology National Center for Toxicological Research/FDA Jefferson AR 72079 USA. Advanced Materials Processing and Analysis Centre Nanoscience Technology Center Mechanical Materials Aerospace Engineering University of Central Florida Orlando FL 32816 USA. Laboratory of Neurosciences National Institute on Aging Intramural Research Program Baltimore MD 21224 USA Department of Neuroscience Johns Hopkins University School of Medicine Baltimore MD 21205 USA. Electronic address: mark.mattson@nih.gov.

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