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arXiv 2021年

作者： Hoffmann, Michael Wang, Zheng Tasneem, Nujhat Zubair, Ahmad Ravindran, Prasanna Venkat Tian, Mengkun Gaskell, Anthony Triyoso, Dina Consiglio, Steven Tapily, Kanda Clark, Robert Hur, Jae Pentapati, Sai Surya Kiran Dopita, Milan Yu, Shimeng Chern, Winston Kacher, Josh Reyes-Lillo, Sebastian E. Antoniadis, Dimitri Ravichandran, Jayakanth Slesazeck, Stefan Mikolajick, Thomas Khan, Asif Islam NaMLab GGmbH Dresden01187 Germany School of Electrical and Computer Engineering Georgia Institute of Technology AtlantaGA30332 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02142 United States Institute for Electronics and Nanotechnology Georgia Institute of Technology AtlantaGA30332 United States TEL Technology Center America LLC 255 Fuller Rd. AlbanyNY12203 United States Department of Condensed Matter Physics Faculty of Mathematics and Physics Charles University Ke Karlovu 5 Prague12116 Czech Republic Izentis LLC PO Box 397002 CambridgeMA02139 United States School of Materials Science and Engineering Georgia Institute of Technology AtlantaGA30332 United States Departamento de Ciencias Físicas Universidad Andres Bello Santiago837-0136 Chile Department of Chemical Engineering and Materials Science University of Southern California Los AngelesCA90089 United States Institute of Semiconductors and Microsystems TU Dresden Dresden Germany Department of Electrical Engineering and Computer Sciences University of California BerkeleyCA94720 United States

Crystalline materials with broken inversion symmetry can exhibit a spontaneous electric polarization, which originates from a microscopic electric dipole moment. Long-range polar or anti-polar order of such permanent dipoles gives rise to ferroelectricity or antiferroelectricity, respectively. However, the recently discovered antiferroelectrics of fluorite structure (HfO2 and ZrO2) are different: A non-polar phase transforms into a polar phase by spontaneous inversion symmetry breaking upon the application of an electric field. Here, we show that this structural transition in antiferroelectric ZrO2gives rise to a negative capacitance, which is promising for overcoming the fundamental limits of energy efficiency in electronics. Our findings provide insight into the thermodynamically 'forbidden' region of the antiferroelectric transition in ZrO2and extend the concept of negative capacitance beyond ferroelectricity. This shows that negative capacitance is a more general phenomenon than previously thought and can be expected in a much broader range of materials exhibiting structural phase transitions. Copyright © 2021, The Authors. All rights reserved.

关键词： Electric fields

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Solution-Processed and Self-Assembled Monolayer-Treated High-Voltage Organic Thin Film Transistors for Flexible MEMS Integration

Solution-Processed and Self-Assembled Monolayer-Treated High...

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MRS Advances

作者： Shih, Andy Akinwande, Akintunde Ibitayo Department of Electrical Engineering and Computer Science Microsystems Technology Laboratory Massachusetts Institute of Technology CambridgeMA02139 United States

We report a 6,13-Bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) solution-processed high-voltage organic thin film transistor (HVOTFT) with a large breakdown voltage of |VDS| > 450 V, a three-fold increase from previous results. An offset channel architecture and an organosilane-based self-assembled monolayer (SAM) treatment were used to achieve large breakdown voltages. Solution-processed HVOTFTs will enable novel high-voltage and flexible applications. Reliability of the HVOTFT under high-field stress was studied in the context of threshold and onset to conduction voltages. Copyright © Materials Research Society 2018.

关键词： Thin films

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Highly squeezed nanophotonic quantum microcombs with broadband frequency tunability

arXiv

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arXiv 2025年

作者： Shen, Yichen Hsieh, Ping-Yen Srinivasan, Dhruv Henry, Antoine Moille, Gregory Sridhar, Sashank Kaushik Restelli, Alessandro Chang, You-Chia Srinivasan, Kartik Smith, Thomas A. Dutt, Avik Department of Mechanical Engineering Institute for Physical Science & Technology University of Maryland College ParkMD20742 United States Department of Photonics College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu City30069 Taiwan Joint Quantum Institute National Institute of Standards and Technology University of Maryland College ParkMD20742 United States Microsystems and Nanotechnology Division National Institute of Standards and Technology GaithersburgMD20899 United States Quantum Research and Applications Branch Naval Air Warfare Center Aircraft Division Patuxent RiverMD20670 United States at Maryland College ParkMD20740 United States

Squeezed light offers genuine quantum advantage in enhanced sensing and quantum computation;yet the level of squeezing or quantum noise reduction generated from nanophotonic chips has been limited. In addition to strong quantum noise reduction, key desiderata for such a nanophotonic squeezer include frequency agility or tunability over a broad frequency range, and simultaneous operation in many distinct, well-defined quantum modes (qumodes). Here we present a strongly overcoupled silicon nitride squeezer based on a below-threshold optical parametric amplifier (OPA) that produces directly detected squeezing of 5.6 dB ± 0.2 dB, surpassing previous demonstrations in both continuous-wave and pulsed regimes. We introduce a seed-assisted detection technique into such nanophotonic squeezers that reveals a quantum frequency comb (QFC) of 16 qumodes, with a separation of 11 THz between the furthest qumode pair, while maintaining a strong squeezing. Additionally, we report spectral tuning of a qumode comb pair over one free-spectral range of the OPA, thus bridging the spacing between the discrete modes of the QFC. Our results significantly advance both the generation and detection of nanophotonic squeezed light in a broadband and multimode platform, establishing a scalable, chip-integrated path for compact quantum sensors and continuous-variable quantum information processing systems. © 2025, CC BY-NC-SA.

关键词： Quantum noise

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Development of Quantum Interconnects (QuICs) for Next-Generation Information Technologies

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PRX Quantum 2021年第1期2卷 017002-017002页

作者： David Awschalom Karl K. Berggren Hannes Bernien Sunil Bhave Lincoln D. Carr Paul Davids Sophia E. Economou Dirk Englund Andrei Faraon Martin Fejer Saikat Guha Martin V. Gustafsson Evelyn Hu Liang Jiang Jungsang Kim Boris Korzh Prem Kumar Paul G. Kwiat Marko Lončar Mikhail D. Lukin David A.B. Miller Christopher Monroe Sae Woo Nam Prineha Narang Jason S. Orcutt Michael G. Raymer Amir H. Safavi-Naeini Maria Spiropulu Kartik Srinivasan Shuo Sun Jelena Vučković Edo Waks Ronald Walsworth Andrew M. Weiner Zheshen Zhang Pritzker School of Molecular Engineering University of Chicago Chicago Illinois 60637 USA Department of Electrical Engineering and Computer Science MIT Cambridge Massachusetts 02139 USA School of Electrical and Computer Engineering Purdue University West Lafayette Indiana 47907 USA Department of Physics Colorado School of Mines 1500 Illinois Street Golden Colorado 80401 USA Photonic & Phononic Microsystems Sandia National Laboratory Albuquerque New Mexico 87185 USA Department of Physics Virginia Tech Blacksburg Virginia 24061 USA T .J. Watson Laboratory of Applied Physics California Institute of Technology Pasadena California 91125 USA Kavli Nanoscience Institute California Institute of Technology Pasadena California 91125 USA E.L. Ginzton Laboratory Stanford University Stanford California 94305 USA College of Optical Sciences The University of Arizona Tucson Arizona 85721 USA Department of Electrical and Computer Engineering The University of Arizona Tucson Arizona 85721 USA Department of Applied Mathematics The University of Arizona Tucson Arizona 85721 USA Raytheon BBN Technologies Cambridge Massachusetts 02138 USA John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge Massachusetts 02138 USA Harvard Quantum Initiative (HQI) Harvard University Cambridge Massachusetts 02138 USA Department of Electrical and Computer Engineering Duke University Durham North Carolina 27708 USA IonQ Inc. College Park Maryland 20740 USA Jet Propulsion Laboratory California Institute of Technology Pasadena California 91109 USA Department of Electrical and Computer Engineering Northwestern University Evanston Illinois 60208 USA Department of Physics and Astronomy Northwestern University Evanston Illinois 60208 USA Department of Physics University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA IQUIST University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Department of Physics Harvard Universi

Just as “classical” information technology rests on a foundation built of interconnected information-processing systems, quantum information technology (QIT) must do the same. A critical component of such systems is the “interconnect,” a device or process that allows transfer of information between disparate physical media, for example, semiconductor electronics, individual atoms, light pulses in optical fiber, or microwave fields. While interconnects have been well engineered for decades in the realm of classical information technology, quantum interconnects (QuICs) present special challenges, as they must allow the transfer of fragile quantum states between different physical parts or degrees of freedom of the system. The diversity of QIT platforms (superconducting, atomic, solid-state color center, optical, etc.) that will form a “quantum internet” poses additional challenges. As quantum systems scale to larger size, the quantum interconnect bottleneck is imminent, and is emerging as a grand challenge for QIT. For these reasons, it is the position of the community represented by participants of the NSF workshop on “Quantum Interconnects” that accelerating QuIC research is crucial for sustained development of a national quantum science and technology program. Given the diversity of QIT platforms, materials used, applications, and infrastructure required, a convergent research program including partnership between academia, industry, and national laboratories is required.

关键词： Cold atoms & matter waves Nonlinear optics Optics & lasers Photonics Quantum communication Quantum computation Quantum error correction Quantum information architectures & platforms Quantum information processing Quantum metrology Quantum optics Atomic systems Optical materials & elements Quantum dots

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Checking the Plausibility of Nutrient Data in Food Datasets Using KNIME and Big Data

Checking the Plausibility of Nutrient Data in Food Datasets ...

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IEEE International Conference on Wireless and Mobile Computing, Networking And Communications (WiMob)

作者： Alexander Muenzberg Janina Sauer Andreas Hein Norbert Roesch Department of Computer Science and Microsystems Technology University of Applied Sciences Kaiserslautern Zweibrücken Germany Department of Assistance Systems and Medical Technology Carl von Ossietzky University Oldenburg Germany

ISBN: (纸本)9781728133171

As there is no standardized food database with all products available in Europe, many developers of health apps fall back on databases of communities whose quality is often insufficient. In health apps, the quality of the data sets is critical, as poor quality lowers the user's confidence. This paper examines the plausibility of nutrient data from such data sources using similarity analysis, decision support methods and Big Data technology. During a special developed process, the plausibility of the data is to be increased. Finally, the methods used will be evaluated on the basis of test data.

关键词： Decision trees Databases Conferences Wireless communication Big Data Data mining Food products

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Reconfigurable Acoustic Metagrating for High-Efficiency Anomalous Reflection

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Physical Review Applied 2020年第6期13卷 064067-064067页

作者： Yan Kei Chiang Sebastian Oberst Anton Melnikov Li Quan Steffen Marburg Andrea Alù David A. Powell School of Engineering and Information Technology University of New South Wales Canberra Australia Centre for Audio Acoustics and Vibration University of Technology Sydney Australia Vibroacoustics of Vehicles and Machines Technical University Munich Germany Fraunhofer Institute for Photonic Microsystems Dresden Germany Department of Electrical and Computer Engineering The University of Texas at Austin Austin Texas 78712 USA Photonics Initiative Advanced Science Research Center City University of New York New York New York USA

Metagratings are a recently proposed class of metasurfaces for efficient manipulation of an impinging wavefront within a subwavelength layer. They avoid the requirement for fine discretization of gradient metasurfaces, and overcome their inherent limitations in efficiency. Here, we demonstrate experimentally the functioning principle of a reconfigurable acoustic metagrating for anomalous reflection with high efficiency, using coarse geometric design features. It is formed by a periodic array of C-shaped meta-atoms, which exhibit large Willis coupling, resulting in a controlled level of asymmetry in their scattering pattern. Our results reveal that the proposed acoustic metagrating can reroute an incident wave towards a large angle, beyond the limitations of gradient-phase approaches with nearly unitary reflection efficiency. The proposed designs offer a highly efficient tunable platform to control steering angle and operating frequency. In our experiments, an acoustic wave is successfully steered to the desired reflection direction by finite metagratings, demonstrating reconfigurability in angle and operating frequency.

关键词： Acoustic measurements Acoustic metamaterials Acoustic modeling Acoustic wave phenomena Acoustic techniques Finite-element method

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Graphene ribbons with suspended masses as transducers in ultra-small nanoelectromechanical accelerometers

arXiv

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arXiv 2020年

作者： Fan, Xuge Forsberg, Fredrik Smith, Anderson D. Schröder, Stephan Wagner, Stefan Rödjegård, Henrik Fischer, Andreas C. Östling, Mikael Lemme, Max C. Niklaus, Frank Department of Micro and Nanosystems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology StockholmSE-10044 Sweden Scania Technical Centre Södertälje15148 Sweden Department of Integrated Devices and Circuits School of Electrical Engineering and Computer Science KTH Royal Institute of Technology KistaSE-164 40 Sweden Senseair AB Delsbo820 60 Sweden AMO GmbH Otto-Blumenthal-Str. 25 Aachen52074 Germany Silex Microsystems AB Järfälla175 26 Sweden Chair of Electronic Devices Faculty of Electrical Engineering and Information Technology RWTH Aachen University Otto-Blumenthal-Str. 25 Aachen52074 Germany

Nanoelectromechanical system (NEMS) sensors and actuators could be of use in the development of next generation mobile, wearable, and implantable devices. However, these NEMS devices require transducers that are ultra-small, sensitive and can be fabricated at low cost. Here, we show that suspended double-layer graphene ribbons with attached silicon proof masses can be used as combined spring-mass and piezoresistive transducers. The transducers, which are realized using processes that are compatible with large-scale semiconductor manufacturing technologies, can yield NEMS accelerometers that occupy at least two orders of magnitude smaller die area than conventional state-of-the-art silicon accelerometers. With our devices, we also extract the Young's modulus values of double-layer graphene and show that the graphene ribbons have significant built-in stresses. Copyright © 2020, The Authors. All rights reserved.

关键词： Accelerometers

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Broadband Silicon TM-Pass Polarizer using a Slot-Assisted Periodic Waveguide

Broadband Silicon TM-Pass Polarizer using a Slot-Assisted Pe...

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IEEE Photonics Conference (IPC)

作者： Humaira Zafar Mutasem Odeh Anatol Khilo Marcus S. Dahlem Electrical and Computer Eng. Department Khalifa University of Science and Technology Abu Dhabi UAE Department of Electrical Eng. and Computer Sciences University of California Berkeley CA USA Department of Electrical and Computer Eng. Boston University Boston MA USA Photonic Microsystems Interuniversity Microelectronics Center (IMEC) Leuven Belgium

We demonstrate a compact (21 μm × 0.5 μm) silicon TM-pass polarizer based on a slot-assisted periodic waveguide. Measured results show low insertion loss for the TM mode (average 0.7 dB) and high TE loss (avera... 详细信息

关键词： Silicon Insertion loss Loss measurement Photonics Gratings Wavelength measurement Dispersion

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2022 Roadmap on Neuromorphic Computing and Engineering

arXiv

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arXiv 2021年

作者： Christensen, Dennis Valbjørn Dittmann, Regina Linares-Barranco, Bernabé Sebastian, Abu Le Gallo, Manuel Redaelli, Andrea Slesazeck, Stefan Mikolajick, Thomas Spiga, Sabina Menzel, Stephan Valov, Ilia Milano, Gianluca Ricciardi, Carlo Liang, Shi-Jun Miao, Feng Lanza, Mario Quill, Tyler J. Keene, Scott T. Salleo, Alberto Grollier, Julie Marković, Danijela Mizrahi, Alice Yao, Peng Yang, J. Joshua Indiveri, Giacomo Strachan, John Paul Datta, Suman Vianello, Elisa Valentian, Alexandre Feldmann, Johannes Li, Xuan Pernice, Wolfram H.P. Bhaskaran, Harish Furber, Steve Neftci, Emre Scherr, Franz Maass, Wolfgang Ramaswamy, Srikanth Tapson, Jonathan Panda, Priyadarshini Kim, Youngeun Tanaka, Gouhei Thorpe, Simon Bartolozzi, Chiara Cleland, Thomas A. Posch, Christoph Liu, Shih-Chii Panuccio, Gabriella Mahmud, Mufti Mazumder, Arnab Neelim Hosseini, Morteza Mohsenin, Tinoosh Donati, Elisa Tolu, Silvia Galeazzi, Roberto Christensen, Martin Ejsing Holm, Sune Ielmini, Daniele Pryds, N. Department of Energy Conversion and Storage Technical University of Denmark Kgs. LyngbyDK-2800 Denmark Peter Gruenberg Institute 7 Forschungszentrum Juelich GmbH Juelich52425 Germany JARA-FIT RWTH Aachen University Aachen52056 Germany CSIC Universidad de Sevilla Seville41092 Spain IBM Research Zurich Switzerland STMicroelectronics Agrate Italy Dresden01187 Germany Institute of Semiconductors and Microsystems TU Dresden Dresden Germany CNR-IMM Unit of Agrate Brianza via C. Olivetti 2 MB Agrate Brianza Italy Juelich Germany Torino Italy Department of Applied Science and Technology Politecnico di Torino Torino Italy National Laboratory of Solid State Microstructures School of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing China Thuwal23955-6900 Saudi Arabia Department of Materials Science and Engineering Stanford University StanfordCA94305 United States Department of Engineering University of Cambridge CambridgeCB2 1PZ United Kingdom Unité Mixte de Physique CNRS Thales Université Paris-Saclay Palaiseau91767 France Electrical and Computer Engineering Department University of Southern California Los AngelesCA United States Institute of Neuroinformatics University of Zurich ETH Zurich Switzerland Hewlett Packard Laboratories Hewlett Packard Enterprise San JoseCA United States Department of Electrical Engineering University of Notre Dame Notre DameIN United States CEA LETI Université Grenoble Alpes Grenoble France CEA LIST Université Grenoble Alpes Grenoble France Department of Materials University of Oxford Parks Road OxfordOX1 3PH United Kingdom Institute of Physics University of Münster Heisenbergstr. 11 Heisenbergstr Münster48149 Germany Center for Soft Nanoscience University of Münster Münster48149 Germany The University of Manchester United Kingdom Department of Cognitive Sciences University of California Irvine IrvineCA United States Institute of Theoretica

Modern computation based on the von Neumann architecture is today a mature cutting-edge science. In the Von Neumann architecture, processing and memory units are implemented as separate blocks interchanging data intensively and continuously. This data transfer is responsible for a large part of the power consumption. The next generation computer technology is expected to solve problems at the exascale with 1018 calculations each second. Even though these future computers will be incredibly powerful, if they are based on von Neumann type architectures, they will consume between 20 and 30 megawatts of power and will not have intrinsic physically built-in capabilities to learn or deal with complex data as our brain does. These needs can be addressed by neuromorphic computing systems which are inspired by the biological concepts of the human brain. This new generation of computers has the potential to be used for the storage and processing of large amounts of digital information with much lower power consumption than conventional processors. Among their potential future applications, an important niche is moving the control from data centers to edge devices. The aim of this Roadmap is to present a snapshot of the present state of neuromorphic technology and provide an opinion on the challenges and opportunities that the future holds in the major areas of neuromorphic technology, namely materials, devices, neuromorphic circuits, neuromorphic algorithms, applications, and ethics. The Roadmap is a collection of perspectives where leading researchers in the neuromorphic community provide their own view about the current state and the future challenges for each research area. We hope that this Roadmap will be a useful resource by providing a concise yet comprehensive introduction to readers outside this field, for those who are just entering the field, as well as providing future perspectives for those who are well established in the neuromorphic computing community. © 2021,

关键词： Data transfer

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Solution-Processed High-Voltage Organic Thin Film Transistor

Solution-Processed High-Voltage Organic Thin Film Transistor

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MRS Advances

作者： Shih, Andy Akinwande, Akintunde Ibitayo Electrical Engineering and Computer Science Department Microsystems Technology Laboratories Massachusetts Institute of Technology CambridgeMA02141 United States

A 6,13-Bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) based high-voltage organic thin film transistor (HVOTFT) has been demonstrated via a low temperature (2 V-1 s-1 and a breakdown voltage of VDS > 120 V, the latter being due a space-charge limiting device architecture in which the channel is partially gated. Non-saturating I-V characteristic behavior was observed. This is in contrast with our vacuum-deposited pentacene HVOTFTs which exhibited breakdown voltages of VDS > 400 V. TIPS-pentacene was grown via a drop-casting deposition, with its crystallinity and grain size deduced under XRD and SEM analysis. The HVOTFT was fabricated with a dielectric stack of a high-k Bi1.5Zn1Nb1.5O7 (BZN) and parylene-C. © Materials Research Society 2017.

关键词： Thin films

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