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First light demonstration of the integrated superconducting spectrometer

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arXiv 2019年

作者： Endo, Akira Karatsu, Kenichi Tamura, Yoichi Oshima, Tai Taniguchi, Akio Takekoshi, Tatsuya Asayama, Shinichiro Bakx, Tom J. L. C. Bosma, Sjoerd Bueno, Juan Chin, Kah Wuy Fujii, Yasunori Fujita, Kazuyuki Huiting, Robert Ikarashi, Soh Ishida, Tsuyoshi Ishii, Shun Kawabe, Ryohei Klapwijk, T.M. Kohno, Kotaro Kouchi, Akira Llombart, Nuria Maekawa, Jun Murugesan, Vignesh Nakatsubo, Shunichi Naruse, Masato Ohtawara, Kazushige Laguna, Alejandro Pascual Suzuki, Junya Suzuki, Koyo Thoen, David J. Tsukagoshi, Takashi Ueda, Tetsutaro Visser, Pieter J. De Werf, Paul P. Vander Yates, Stephen J. C. Yoshimura, Yuki Yurduseven, Ozan Baselmans, Jochem J. A. Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Mekelweg 4 Delft2628 Netherlands Kavli Institute of NanoScience Faculty of Applied Sciences Delft University of Technology Lorentzweg 1 Delft2628 Netherlands SRON|Netherlands Institute for Space Research Sorbonnelaan 2 Utrecht3584 Netherlands Division of Particle and Astrophysical Science Graduate School of Science Nagoya University Aichi464-8602 Japan National Astronomical Observatory of Japan Mitaka Tokyo181-8588 Japan Graduate University for Advanced Studies 2-21-1 Osawa Mitaka Tokyo181-0015 Japan Institute of Astronomy Graduate School of Science University of Tokyo 2-21-1 Osawa Mitaka Tokyo181-0015 Japan Graduate School of Informatics and Engineering University of Electro-Communications Cho-fu Tokyo182-8585 Japan School of Physics and Astronomy Cardi University Parade CardiCF243AA United Kingdom Department of Astronomy School of Science University of Tokyo Bunkyo Tokyo113-0033 Japan Institute of Low Temperature Science Hokkaido University Sapporo060-0819 Japan Joint ALMA Observatory Alonso de Cordova Vitacura Santiago3107 Physics Department Moscow State Pedagogical University Moscow119991 Russia Research Center for the Early Universe Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-0033 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara252-5210 Japan Graduate School of Science and Engineering Saitama University 255 Shimo-okubo Sakura Saitama338-8570 Japan High Energy Accelerator Research Organization 1-1 Oho Tsukuba Ibaraki305-0801 Japan Leiden Observatory Leiden University PO Box 9513 LeidenNL-2300 Netherlands SRON Netherlands Institute for Space Research Landleven 12 Groningen9747 Netherlands

Ultra-wideband 3D imaging spectrometry in the millimeter-submillimeter (mm-submm) band is an essential tool for uncovering the dust-enshrouded portion of the cosmic history of star formation and galaxy evolution1{3. However, t is challenging to scale up conventional coherent heterodyne receivers4 or free-space diffraction techniques5 to suficient bandwidths (≥1 octave) and numbers of spatial pixels2,3 (>102). Here we present the design and first astronomical spectra of an intrinsically scalable, ntegrated superconducting spectrometer6, which covers 332{377 GHz with a spectral resolution of F/ΔF ∼ 380. It combines the multiplexing advantage of microwave kinetic inductance detectors (MKIDs7) with planar superconducting filters for dispersing the signal in a single, small superconducting integrated circuit. We demonstrate the two key applications for an instrument of this type: As an eficient redshift machine, and as a fast multi-line spectral mapper of extended areas. The line detection sensitivity is in excellent agreement with the instrument design and laboratory performance, reaching the atmospheric foreground photon noise limit on sky. The design can be scaled to bandwidths in excess of an octave, spectral resolution up to a few thousand and frequencies up to ∼1.1 THz. The miniature chip footprint of a few cm2 allows for compact multi-pixel spectral imagers, which would enable spectroscopic direct imaging and large volume spectroscopic surveys that are several orders of magnitude faster than what is currently possible1{3. Copyright © 2019, The Authors. All rights reserved.

关键词： Bandwidth

Nonreciprocal cavities and the time-bandwidth limit

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arXiv 2018年

作者： Mann, Sander A. Sounas, Dimitrios L. Alù, Andrea Department of Electrical and Computer Engineering University of Texas at Austin AustinTX United States Photonics Initiative Advanced Science Research Center City University of New York New York10031 United States Physics Program Graduate Center City University of New York New York10016 United States Department of Electrical Engineering City College of the City University of New York New York10031 United States

The time-bandwidth limit inherently relates the lifetime of a resonance and its spectral bandwidth, with direct implications on the maximum storage time of a pulse versus its frequency content. It has been recently argued that nonreciprocal cavities may overcome this constraint, by breaking the strict equality of their incoupling and outcoupling coefficients. Here, we generally study the implications of nonreciprocity on resonant cavities and derive general relations, stemming from microscopic reversibility, that govern their dynamics. We show that nonreciprocal cavities do not provide specific advantages in terms of the time-bandwidth limit, but they may have other attractive properties for nanophotonic systems. Copyright © 2018, The Authors. All rights reserved.

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Active control of a plasmonic metamaterial for quantum state engineering

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arXiv 2018年

作者： Uriri, S.A. Tashima, T. Zhang, X. Asano, M. Bechu, M. Güney, D.Ö. Yamamoto, T. Özdemir, Ş.K. Wegener, M. Tame, M.S. School of Chemistry and Physics University of KwaZulu-Natal Durban4001 South Africa Department of Material Engineering Science Graduate School of Engineering Science Osaka University Osaka560-8531 Japan Institute of Applied Physics Karlsruhe Institute of Technology Karlsruhe76128 Germany Institute of Nanotechnology Karlsruhe Institute of Technology Karlsruhe76128 Germany Department of Electrical and Computer Engineering Michigan Technological University HoughtonMI49931 United States Department of Engineering Science and Mechanics Pennsylvania State University University ParkPA16802 United States

We experimentally demonstrate the active control of a plasmonic metamaterial operating in the quantum regime. A two-dimensional metamaterial consisting of unit cells made from gold nanorods is investigated. Using an external laser we control the temperature of the metamaterial and carry out quantum process tomography on single-photon polarization-encoded qubits sent through, characterizing the metamaterial as a variable quantum channel. The overall polarization response can be tuned by up to 33% for particular nanorod dimensions. To explain the results, we develop a theoretical model and find that the experimental results match the predicted behavior well. This work goes beyond the use of simple passive quantum plasmonic systems and shows that external control of plasmonic elements enables a flexible device that can be used for quantum state engineering. Copyright © 2018, The Authors. All rights reserved.

关键词： Nanorods

Non-reciprocal hyperbolic propagation over moving metasurfaces

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arXiv 2018年

作者： Mazor, Yarden Alu, Andrea Department of Electrical and Computer Engineering University of Texas at Austin AustinTX78712 United States Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Department of Electrical Engineering City College of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York New YorkNY10026 United States

Hyperbolic propagation offers exciting opportunities in nanophotonics, from sub-diffraction imaging to enhanced local density of states. This transport regime is typically induced by strong modulation of conductivity, i.e., with alternating metallic and dielectric material properties. Here, we analyze a moving impedance surface, showing that suitably tailored homogeneous metasurfaces can support one-way hyperbolic propagation when in motion, adding non-reciprocity to hyperbolic propagation phenomena, and without suffering from nonlocal effects stemming from discretization or finite granularity of the surface. Copyright © 2018, The Authors. All rights reserved.

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Angular-Momentum Selectivity and Asymmetry in Highly Confined Wave Propagation along Sheath-Helical Metasurface Tubes

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arXiv 2018年

作者： Mazor, Yarden Alù, Andrea Department of Electrical and Computer Engineering University of Texas at Austin AustinTX78712 United States Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York New YorkNY10026 United States Department of Electrical Engineering City College of New York New YorkNY10031 United States

Highly confined surface waves present unique opportunities to enhance light interactions with localized emitters or molecules. Hyperbolic dispersion in metasurfaces allows us to tailor and manipulate surface waves, enhancing the local density of states over broad bandwidths. So far, propagation on this platform was mainly studied in planar geometries, which facilitates the analysis but somehow limits the realm of possibilities. Here we show that "wrapping" hyperbolic metasurfaces into tubes may greatly enrich the wave propagation dynamics along their axis. This system shows strong interaction with fields and sources carrying optical angular momentum, pronounced field asymmetries, and opens pathways to valley-specific excitation and routing. In addition, we demonstrate that various parameter regimes enable strong spin/helicity – momentum locking. Copyright © 2018, The Authors. All rights reserved.

关键词： Surface waves

Notification-Oriented programming Language and Compiler

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Notification-Oriented Programming Language and Compiler

Brazilian Symposium on Computing System engineering (SBESC)

作者： Adriano Francisco Ronszcka Cleverson Avelino Ferreira Paulo Cézar Stadzisz João Alberto Fabro Jean Marcelo Simão Graduate School in Electrical Engineering and Industrial Computer Science (CPGEI) Graduate School of Applied Computing (PPGCA) Federal University of Technology Parana (UTFPR) Curitiba Brazil

The so-called Notification-Oriented Paradigm (NOP) is a new technique to develop software. NOP is a rule-oriented approach where each rule and fact-base element is split in small entities. These entities particularly collaborate by means of precise notifications only when their state changes. This allows carrying out an inference process free of structural and temporal redundancies. Due to its peculiar properties, NOP tends to be an alternative to achieve suitable performance in program execution, easiness in codification level, and appropriate code modularity, structuration and decoupling. In order to validate these supposed features, a framework was implemented in C++. Even though it quite demonstrated the features of the paradigm in terms of execution performance and development process, it still presented a gap therein. In this context, this paper presents a preliminary programming language and compiler to explore NOP features. This new approach simplifies the development in NOP and speedup execution performance.

关键词： Redundancy C++ languages programming Collaboration Engines Couplings

The evolutionary history of 2,658 cancers (vol 578, pg 122, 2020)

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NATURE 2023年第7948期614卷 E42-E42页

作者： Gerstung, Moritz Jolly, Clemency Leshchiner, Ignaty Dentro, Stefan C. Gonzalez, Santiago Rosebrock, Daniel Mitchell, Thomas J. Rubanova, Yulia Anur, Pavana Yu, Kaixian Tarabichi, Maxime Deshwar, Amit Wintersinger, Jeff Kleinheinz, Kortine Vazquez-Garcia, Ignacio Haase, Kerstin Jerman, Lara Sengupta, Subhajit Macintyre, Geoff Malikic, Salem Donmez, Nilgun Livitz, Dimitri G. Cmero, Marek Demeulemeester, Jonas Schumacher, Steven Fan, Yu Yao, Xiaotong Lee, Juhee Schlesner, Matthias Boutros, Paul C. Bowtell, David D. Zhu, Hongtu Getz, Gad Imielinski, Marcin Beroukhim, Rameen Sahinalp, S. Cenk Ji, Yuan Peifer, Martin Markowetz, Florian Mustonen, Ville Yuan, Ke Wang, Wenyi Morris, Quaid D. Spellman, Paul T. Wedge, David C. Van Loo, Peter European Molecular Biology Laboratory European Bioinformatics Institute (EMBL-EBI) Cambridge UK European Molecular Biology Laboratory Genome Biology Unit Heidelberg Germany Wellcome Sanger Institute Cambridge UK Genome Biology Unit European Molecular Biology Laboratory (EMBL) Heidelberg Germany University of Ljubljana Ljubljana Slovenia The Francis Crick Institute London UK Big Data Institute University of Oxford Oxford UK Wellcome Sanger Institute Wellcome Genome Campus Hinxton UK Big Data Institute Li Ka Shing Centre University of Oxford Oxford UK University of Cambridge Cambridge UK Cambridge University Hospitals NHS Foundation Trust Cambridge UK Department of Applied Mathematics and Theoretical Physics Centre for Mathematical Sciences University of Cambridge Cambridge UK Department of Epidemiology and Biostatistics Memorial Sloan Kettering Cancer Center New York NY USA Department of Statistics Columbia University New York NY USA Department of Haematology University of Cambridge Cambridge UK University of Leuven Leuven Belgium Broad Institute of MIT and Harvard Cambridge MA USA Center for Cancer Research Massachusetts General Hospital Charlestown MA USA Department of Pathology Massachusetts General Hospital Boston MA USA Harvard Medical School Boston MA USA Center for Cancer Research Massachusetts General Hospital Boston MA USA Dana-Farber Cancer Institute Boston MA USA Department of Medical Oncology Dana-Farber Cancer Institute Boston MA USA Department of Cancer Biology Dana-Farber Cancer Institute Boston MA USA Oxford NIHR Biomedical Research Centre Oxford UK Oxford NIHR Biomedical Research Centre University of Oxford Oxford UK University of Toronto Toronto Ontario Canada Vector Institute Toronto Ontario Canada Vector Institute Toronto ON Canada Department of Computer Science University of Toronto Toronto ON Canada Ontario Institute for Cancer Research Toronto Ontario Canada University of California Los Angeles

Conceptual Design of Mobile Application for Post-disaster Rapid Assessment of Damaged Houses

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IOP Conference Series: Earth and Environmental science 2019年第1期273卷

作者： I Setyawati K Munadi Y Idris Syamsidik S Muchallil Post Graduate of Disaster Science Program Syiah Kuala University Banda Aceh Indonesia Tsunami and Disaster Mitigation Research Center (TDMRC) Syiah Kuala University Banda Aceh Indonesia Electrical and Computer Engineering Department Syiah Kuala University Banda Aceh Indonesia Civil Engineering Department Syiah Kuala University Banda Aceh Indonesia

The current rapid assessment of post-earthquake damaged houses has been done manually. The determination of the damage level is also very subjective. Moreover, the available time during a rapid assessment and limited number of enumerators lead to ineffective decisions for responses and assistances. There are several application had appeared trying to answer the problems, but still they have many types of data that need to be input and even need a lot of time to process. The system design to be simple, more user-friendly and time efficient to be operated during the assessment. This study is aimed to develop a conceptual design of a system to collect data of houses damaged by earthquake using mobile application which propose to work both online and offline. The system will consists of five components: mobile device, user, data center (web server and database), internet, and data processing center (administrator and manager to verify and analyze the data). The application design to be integrated with Google Maps containing concise data entry to facilitate users (trained users and common users) and to shorten the time of data collection. Final collected data will be presented through the website and perform descriptive and spatial analysis.

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Implementation of Augmented Reality in Pretend Play Therapy for Children with Autism Spectrum Disorder

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Journal of Physics: Conference Series 2019年第1期1235卷

作者： M F Syahputra A P Angkasih S Purnamawati U Andayani D Abdullah S Sriadhi A Iskandar T M Rosida J Fitriany I N Sari M D Utama R F Nanuru Department of Information Technology Faculty of Computer Science and Information Technology Universitas Sumatera Utara Medan Indonesia Department of Informatics Universitas Malikussaleh Aceh Utara Indonesia Department of Electrical Engineering Universitas Negeri Medan Indonesia Informatics Engineering STMIK AKBA Makassar Indonesia Graduate Program in Scientific Psychology Universitas Kristen Maranatha Indonesia Department of Pediatric Universitas Malikussaleh Aceh Utara Indonesia Departement of Social Science Education Program Post Graduate Program Universitas Kanjuruhan Malang Malang Indonesia Faculty of Social and Political Science Universitas Kristen Indonesia Maluku Indonesia Universitas Kristen Indonesia Maluku Ambon Indonesia

Autism Spectrum Disorder is a pervasive developmental disorder that will affect children in terms of interpersonal communication, social interaction, and imaginative levels in play. Many therapies to help the motor neuron performance is one of them Pretend Play. Pretend Play is a therapy that invites children in playing to demonstrate something else and tell how to use objects that are considered in the child's imagination. However, in the era of highly developed technology, many fields have used the Augmented Reality method as a visualization of various aspects. With this method researchers will present the therapeutic visualization of the block to 3D transportation tool that is useful for strengthening motor nerves and visual strength of the child. The system can run well during marker detection, marker movement, and 3D object display with the accuracy of precision angle and distance between virtual world with real world reach 100% with angle 0 at distance 31 cm and the maximum distance from the marker is 46 cm and the maximum angle is 30˚.

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