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Suspended Si/air high contrast subwavelength gratings for long-wavelength infrared reflectors

Proceedings of SPIE - The International Society for Optical engineering 2013年 8633卷

作者： Foley, Justin M. Phillips, Jamie D. Applied Physics Program University of Michigan 450 Church St. Ann Arbor MI 48109-1040 United States Electrical Engineering and Computer Science Department University of Michigan 1301 Beal Ave. Ann Arbor MI 48109-2122 United States

ISBN: (纸本)9780819494023

We report broadband reflectance in the long-wavelength infrared (LWIR, 8-12 μm) utilizing suspended-Si, high-index-contrast subwavelength gratings (HCGs). Iterative design optimization using finite element analysis software has been performed accounting for silicon's wavelength-dependent index of refraction and extinction coefficient. Grating arrays were fabricated using commercial silicon-on-insulator (SOI) substrates, photolithography and reactive ion etching; subsequent selective wet etching of SiO2was used to provide suspended Si/air gratings. Fourier transform infrared (FTIR) spectroscopy demonstrates broadband, polarization-dependent reflectance between 8.5 and 12 μm, which agrees with the simulated response. © 2013 SPIE.

关键词： Infrared radiation Diffraction gratings Finite element method Fourier transform infrared spectroscopy Hyperspectral imaging Infrared devices Reactive ion etching Reflection Refractive index Silica Silicon on insulator technology Silicon oxides Broadband reflector Filter HCG reflector High contrast gratings Long wavelength infrared LWIR

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Poster abstracts

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Sleep and Biological Rhythms 2016年第1期5卷 A1-A189页

作者： J. Ferrie M. Shipley F. Cappuccio E. Brunner M. Miller M. Kumari M. Marmot A. Coenen J. L. Castillo F. Araya G. Bustamante L. Montecino C. Torres S. Oporto J. Gronli E. Fiske R. Murison B. Bjorvatn E. Sorensen R. Ursin C. M. Portas S. Rajaraman A. Gribok N. Wesensten T. Balkin J. Reifman N. Dursunoglu S. Ozkurt S. Baser O. Delen S. Sarikaya P. Sadler P. Mitchell D. Françon M. Decobert B. Herve A. Richard G. Griebel P. Avenet B. Scatton G. L. Fur D. Eckert A. Jordan A. Wellman S. Smith A. Malhotra D. White D. Bruck I. Thomas A. Kritikos W. Oertel K. Stiasny-Kolster D. Garcia-Borreguero W. Poewe B. Hoegl R. Kohnen E. Schollmayer J. Keffel C. Trenkwalder A. Valle S. Roizenblatt F. Fregni P. Boggio S. Tufik K. Ward L. Robertson L. Palmer P. Eastwood D. Hillman J. Lee S. Mukherjee V. de Padova G. Barbato G. Ficca I. Zilli P. Salzarulo M. Veldi T. Hion V. Vasar M. Kull L. Nowak J. Davis Y. Latzer O. Tzischinsky S. Crowley M. Carskadon M. Anca-Herschkovitsch D. Frey J. Ortega C. Wiseman C. Farley K. Wright A. Campbell A. Neill K. Spiegel R. Leproult E. Tasali N. Scherberg E. van Cauter A. T. Noradina N. A. Karim I. Norlinah A. A. Raymond R. Sahathevan B. Hamidon E. Werth R. Poryazova R. Khatami C. Bassetti R. G. Beran L. Ainley G. Holand J. Duncan H. Kinney B. Davis B. Hood S. Frey C. Schmidt M. Hofstetter P. Peigneux C. Cajochen W.-P. Hu J.-D. Li C. Zhang L. Boehmer J. Siegel Q.-Y. Zhou Y. Sagawa H. Kondo T. Takemura H. Kanayama Y. Kaneko M. Sato T. Kanbayashi Y. Hishikawa T. Shimizu A. Viola L. James L. Schlangen D.-J. Dijk R. Andretic Y.-C. Kim K.-A. Han F. Jones R. Greenspan L. Sanford L. Yang X. Tang K. Dieter E. Uta H. Sven M. Richard N. Oyane S. Pallesen F. Holsten Y. Inoue M. Fujita N. Emura K. Kuroda N. Uchimura A. Johnston J. Astbury G. Kennedy K. Hoedlmoser M. Schabus T. Pecherstorfer S. Moser G. Gruber P. Anderer W. Klimesch N. Naidoo M. Ferber A. Pack D. Neu O. Mairesse G. Hoffmann A. Dris L. Lambrecht P. Linkowski P. Verbanck O. Le Bon N. Matsuura M. Yamao N. Adachi R. Aritomi Y. Komada H. Tanaka S. Shirak University College London London UK University College London London USA Warwick Medical School London UK Warwick Medical School Coventry USA Radboud University Nijmegen Nijmegen Netherlands Department of Neurology University of Chile Santiago Chile Neurology Service Hospital del Salvador Santiago Chile Family Health Center Juan Pablo II Santiago Chile Department of Biomedicine Section on Physiology Univeristy of Bergen Bergen Norway Department of Public Health and Primary Health Care Univeristy of Bergen Bergen Norway Department of Public Health and Primary Health Care University of Bergen Bergen Norway Norwegian Competence Center for Sleep Disorders Haukeland University Hospital Bergen Norway Department of Child and Adolescent Psychiatry Haukeland University Hospital Univeristy of Bergen Bergen Norway Department of Biomedicine University of Bergen Bergen Norway US Army Medical Research and Materiel Command Fort Detrick Frederick USA Walter Reed Army Institute of Research Silver Spring USA Department of Behavioral Biology Walter Reed Army Institute of Research Silver Spring USA Faculty Department of Pulmonology Pamukkale University Medical Denizli Turkey University of Ballarat Ballarat Australia Sanofi-Aventis Recherche et Developpement Paris France Brigham and Women’s Hospital Harvard Medical School Boston USA The University of Queensland Adelaide Australia School of Psychology University of Queensland Brisbane Australia The University of Queensland Brisbane Australia Victoria University Melbourne Australia Department of Psychology Victoria University Melbourne Australia School of Psychology Victoria University Melbourne Australia Philips-Universität Marburg Germany Philips-Universitaet-Marburg Marburg Germany Instituto de Investigaciones del Sueno Madrid Spain Universitätsklinik für Neurologie Innsbruck Austria Universitaetsklinik fuer Neurologie Innsbruck Austria IMEREM GmbH Nuernberg Germany Schwarz Pharma AG Monheim Germany

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A low power miniaturized CMOS-based continuous glucose monitoring system

A low power miniaturized CMOS-based continuous glucose monit...

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International Workshop on Wearable and Implantable Body Sensor Networks (BSN)

作者： Robert A. Croce Santhisagar Vaddiraju Allen Legassey Yan Wang Diane Burgess Fotios Papadimitrakopoulos Faquir C. Jain Biorasis Inc. Technology Incubation Program Storrs CT 06269 USA Technology Incubation Program Biorasis Inc. Storrs CT USA Department of Pharmaceutical Sciences University of Connecticut Storrs CT USA Polymer Program Department of Chemistry Institute of Materials Science University of Connecticut Storrs CT USA Department of Electrical and Computer Engineering University of Connecticut Storrs CT USA

ISBN: (纸本)9781479903313

This paper presents the design and fabrication of a highly-miniaturized system for continuous glucose monitoring which holds great promise for patients inflicted with diabetes mellitus. To achieve the realization of a truly implantable system, a variety of issues such as robust electrochemical sensor design, miniaturization of the electronic components and counteracting biofouling and negative tissue response need to be addressed. In this report, we present a highly-miniaturized transcutaneous continuous glucose monitoring system which holistically addresses the aforementioned tribulations associated with implantable devices. Specifically, a high performance amperometric electrochemical glucose sensor is integrated with custom designed complementary metal-oxide-semiconductor electronics. The fabricated electrochemical sensor is Clark-based, and employs stratification of five functional layers to achieve a linear response within the physiological range of glucose concentration (2–22 mM). Furthermore, the sensor is encased with a thick polyvinyl alcohol (PVA) hydrogel containing poly(lactic-co-glycolic acid) (PLGA) microspheres which provides continuous, localized delivery of dexamethasone utilized to combat inflammation and fibrosis. Such miniature size (0.665 mm 2 ) and low power operation (140 μW) of the electronic system render it ideal for continuous glucose monitoring devices and other metabolic sensing systems.

关键词： Sugar Monitoring CMOS integrated circuits Signal processing Electrodes Diabetes Sensors

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Bird's-eye view on noise-based logic

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International journal of modern physics. Conference series 2014年第33期33卷 1460363页

作者： Laszlo B Kish Claes G Granqvist Tamas Horvath Andreas Klappenecker He Wen Sergey M Bezrukov Department of Electrical and Computer Engineering Texas A&M University College Station Texas 77843-2128 USA laszlo.kish@ece.tamu.edu. Department of Engineering Sciences The Ångström Laboratory Uppsala University P.O. Box 534 SE-75121 Uppsala Sweden claes-goran.granqvist@angstrom.uu.se. Department of Computer Science University of Bonn Germany Fraunhofer IAIS Schloss Birlinghoven D-53754 Sankt Augustin Germany tamas.horvath@iais.fraunhofer.de. Department of Computer Science Texas A&M University College Station Texas 77843-2128 USA klappi@cse.tamu.edu. College of Electrical and Information Engineering Hunan University Changsha China he_wen82@***. Laboratory of Physical and Structural Biology Program in Physical Biology NICHD National Institutes of Health Bethesda MD 20892 USA.

Noise-based logic is a practically deterministic logic scheme inspired by the randomness of neural spikes and uses a system of uncorrelated stochastic processes and their superposition to represent the logic state. We briefly discuss various questions such as () What does practical determinism mean? () Is noise-based logic a Turing machine? () Is there hope to beat (the dreams of) quantum computation by a classical physical noise-based processor, and what are the minimum hardware requirements for that? Finally, () we address the problem of random number generators and show that the common belief that quantum number generators are superior to classical (thermal) noise-based generators is nothing but a myth.

关键词： Brain Classical versus quantum random number generators Computational complexity Probabilistic Turing machine

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Rotational and translational diffusion of anisotropic gold nanoparticles in liquid crystals controlled by varying surface anchoring

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Physical Review E 2013年第6期88卷 062507-062507页

作者： Bohdan Senyuk David Glugla Ivan I. Smalyukh Department of Physics University of Colorado at Boulder Boulder Colorado 80309 USA Department of Electrical Computer and Energy Engineering University of Colorado at Boulder Boulder Colorado 80309 USA Liquid Crystals Materials Research Center and Materials Science and Engineering Program University of Colorado at Boulder Boulder Colorado 80309 USA Renewable and Sustainable Energy Institute National Renewable Energy Laboratory and University of Colorado at Boulder Boulder Colorado 80309 USA

We study translational and rotational diffusion of anisotropic gold nanoparticles (NPs) dispersed in the bulk of a nematic liquid crystal fluid host. Experimental data reveal strong anisotropy of translational diffusion with respect to the uniform far-field director, which is dependent on shape and surface functionalization of colloids as well as on their ground-state alignment. For example, elongated NPs aligned parallel to the far-field director translationally diffuse more rapidly along the director whereas diffusion of NPs oriented normal to the director is faster in the direction perpendicular to it while they are also undergoing elasticity-constrained rotational diffusion. To understand physical origins of these rich diffusion properties of anisotropic nanocolloids in uniaxially anisotropic nematic fluid media, we compare them to diffusion of prolate and oblate ellipsoidal particles in isotropic fluids as well as to diffusion of shape-isotropic particles in nematic fluids. We also show that surface functionalization of NPs with photosensitive azobenzene groups allows for in situ control of their diffusivity through trans-cis isomerization that changes surface anchoring.

关键词： ANISOTROPY GOLD nanoparticles ROTATIONAL diffusion COLLOIDAL dispersions NEMATIC liquid crystals COLLOIDS AZOBENZENE

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Terahertz Emission From Graphene-Coated InP (100) Surface

Terahertz Emission From Graphene-Coated InP (100) Surface

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Conference on Lasers and Electro-Optics Pacific Rim

作者： Y. Sano M. Tabata K. Salek I. Kawayama M. Wang R. Vajtai J. Kono P. M. Ajayan M. Tonouchi Institute of Laser Engineering Osaka University NanoJapan Program and Department of Electrical and Computer Engineering Rice University Department of Mechanical Engineering and Material Science Rice University

We observed THz radiation from the graphene-coated InP (100) surface and found the drastic change of the waveforms of THz radiation with time, which cannot be explained by the simple absorption of graphene.

ISBN: (纸本)9781467364744

关键词： Chemical vapor deposition Emission Femtosecond pulses Surfaces Thin films Ti:sapphire lasers

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Active self-assembly of algorithmic shapes and patterns in polylogarithmic time 13

Active self-assembly of algorithmic shapes and patterns in p...

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2013 4th ACM Conference on Innovations in Theoretical computer science, ITCS 2013

作者： Woods, Damien Chen, Ho-Lin Goodfriend, Scott Dabby, Nadine Winfree, Erik Yin, Peng Computer Science California Institute of Technology Pasadena CA 91125 United States Center for Mathematics of Information California Institute of Technology Pasadena CA 91125 United States Chemical Engineering California Institute of Technology Pasadena CA 91125 United States Computation and Neural Systems California Institute of Technology Pasadena CA 91125 United States Bioengineering California Institute of Technology Pasadena CA 91125 United States Center for Biological Circuit Design California Institute of Technology Pasadena CA 91125 United States Department of Electrical Engineering National Taiwan University Taiwan Wyss Institute for Biologically Inspired Engineering 3 Blackfan Circle Boston MA 02445 United States

ISBN: (纸本)9781450318594

We describe a computational model for studying the complexity of self-assembled structures with active molecular components. Our model captures notions of growth and movement ubiquitous in biological systems. The model is inspired by biology's fantastic ability to assemble biomolecules that form systems with complicated structure and dynamics, from molecular motors that walk on rigid tracks and proteins that dynamically alter the structure of the cell during mitosis, to embryonic development where large scale complicated organisms efficiently grow from a single cell. Using this active self-assembly model, we show how to efficiently self-assemble shapes and patterns from simple monomers. For example we show how to grow a line of monomers in time and number of monomer states that is merely logarithmic in its length. Our main results show how to grow arbitrary connected two-dimensional geometric shapes and patterns in expected time polylogarithmic in the size of the shape plus roughly the time required to run a Turing machine deciding whether or not a given pixel is in the shape. We do this while keeping the number of monomer types logarithmic in shape size, plus monomers required by the Kolmogorov complexity of the shape or pattern. This work thus highlights the fundamental efficiency advantage of active self-assembly over passive self-assembly and motivates experimental effort to construct self-assembly systems with active molecular components. © 2013 Authors.

关键词： Self assembly

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Photonic crystal biosensor with in-situ synthesized DNA probes for enhanced sensitivity

Photonic crystal biosensor with in-situ synthesized DNA prob...

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IEEE Photonics Conference (IPC)

作者： S. Hu Y. Zhao S. T. Retterer I. I. Kravchenko S. M. Weiss Department of Physics and Astronomy Vanderbilt University Nashville TN USA Interdisciplinary Graduate Program in Materials Science Vanderbilt University Nashville TN USA Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN USA Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN USA

We report on a nearly 8-fold increase in multi-hole defect photonic crystal biosensor response by incorporating insitu synthesis of DNA probes, as compared to the conventional functionalization method employing pre-sy... 详细信息

关键词： Probes Biosensors Photonic crystals DNA Optical surface waves Magnetohydrodynamics Silicon

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Three-dimensional fourier-transform second-harmonic generation microscopy for quantification of collagen fiber organization in biological tissues

Three-dimensional fourier-transform second-harmonic generati...

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Frontiers in Optics, FIO 2012

作者： Lau, Tung-Yuen Ambekar, Raghu Toussaint, Kimani C. United States Department of Mechanical Science and Engineering United States Department of Electrical and Computer Engineering United States Departments of Electrical and Computer Engineering and Bioengineering University of Illinois Urbana-Champaign IL 61820 United States

Fourier transform-second harmonic generation imaging has previously been shown to be useful in quantifying collagen fiber organization in 2D. Here, we generalize this approach to 3D and calculate preferred fiber orien... 详细信息

ISBN: (纸本)9781557529565

关键词： Harmonic generation

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Glushko Dissertation Prize Symposium 35

Glushko Dissertation Prize Symposium

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35th Annual Meeting of the Cognitive science Society - Cooperative Minds: Social Interaction and Group Dynamics, CogSci 2013

作者： Bemis, Douglas Knox Cohn, Neil Kachergis, George Lovett, Andrew Goldstone, Robert L. NSERM-CEA Cognitive Neuroimaging Unit CEA/SAC/DSV/DRM/Neurospin Center Gif-sur-YvetteCedex F-91191 France Center for Research in Language University of California La Jolla San DiegoCA92093-0526 United States Cognitive Psychology Unit Leiden Institute for Brain and Cognition LeidenNL-2333 AK Netherlands Dept. of Electrical Engineering & Computer Science Northwestern University EvanstonIL60208-3118 United States Department of Psychological and Brain Sciences Program in Cognitive Science Indiana University BloomingtonIN47405 United States

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