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CLEO: QELS_Fundamental science, CLEO_QELS 2014

作者： Caspani, Lucia Reimer, Christian Clerici, Matteo Ferrera, Marcello Peccianti, Marco Pasquazi, Alessia Razzari, Luca Little E., Brent Chu T., Sai Moss J., David Morandotti, Roberto INRS-EMT 1650 Boulevard Lionel-Boulet Varennes Québec J3X 1S2 Canada School of Engineering and Physical Sciences Heriot-Watt University SUPA Edinburgh EH14 4AS United Kingdom Department of Physics and Astronomy University of Sussex Falmer Brighton BN1 9QH United Kingdom HiQ Photonics Upper Brookville New York 11545 United States City University of Hong Kong Department of Physics and Material Science Tat Chee Avenue Hong Kong Hong Kong School of Electrical and Computer Engineering RMIT University Melbourne VIC 3001 Australia

We report an integrated, CMOS-compatible source of multiple and independent photon pairs at different wavelengths compatible with standard fiber communication channels and quantum memories. It operates in a self-locke... 详细信息

ISBN: (纸本)9781557529992

关键词： Photons

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Direct generation of orthogonally polarized photon pairs on a chip via spontaneous non-degenerate FWM

Direct generation of orthogonally polarized photon pairs on ...

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Nonlinear Photonics, NP 2014

作者： Reimer, Christian Caspani, Lucia Jestin, Yoann Clerici, Matteo Ferrera, Marcello Razzari, Luca Peccianti, Marco Pasquazi, Alessia Litte, Brent E. Chu, Sai T. Moss, David J. Morandotti, Roberto INRS-EMT 1650 Boulevard Lionel-Boulet VarennesQCJ3X 1S2 Canada School of Engineering and Physical Sciences Heriot-Watt University SUPA EdinburghEH14 4AS United Kingdom Department of Physics and Astronomy University of Sussex Falmer BrightonBN1 9QH United Kingdom Xi'an Institute of Optics and Precision Mechanics CAS Xi'an China Department of Physics and Material Science City University of Hong Kong Tat Chee Avenue Hong Kong Hong Kong School of Electrical and Computer Engineering RMIT University MelbourneVIC3001 Australia

By suppressing stimulated processes, we demonstrate the direct generation of orthogonally polarized photon pairs via spontaneous non-degenerate four-wave-mixing (FWM) between orthogonally polarized pumps in a CMOS-com... 详细信息

ISBN: (纸本)9781557528209

关键词： Photons

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Orthogonally polarized correlated photon pair generation on a chip via self- Pumped spontaneous non- Degenerate FWM

Orthogonally polarized correlated photon pair generation on ...

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CLEO: QELS_Fundamental science, CLEO_QELS 2014

作者： Reimer, Christian Caspani, Lucia Jestin, Yoann Clerici, Matteo Ferrera, Marcello Pasquazi, Marco Alessia, Peccianti Litte E., Brent Chu T., Sai Moss J., David Morandotti, Roberto INRS-EMT 1650 Boulevard Lionel-Boulet Varennes QC J3X 1S2 Canada School of Engineering and Physical Sciences Heriot-Watt University SUPA Edinburgh EH14 4AS United Kingdom Department of Physics and Astronomy University of Sussex Falmer Brighton BN1 9QH United Kingdom HiQ Photonics Upper Brookville NY 11545 United States City University of Hong Kong Department of Physics and Material Science Tat Chee Avenue Hong Kong Hong Kong School of Electrical and Computer Engineering RMIT University Melbourne VIC 3001 Australia

We demonstrate orthogonally polarized photon pair generation via spontaneous nondegenerate four-wave-mixing (FWM) of orthogonally polarized pumps in a CMOS compatible micro-ring resonator by fully suppressing stimulat... 详细信息

ISBN: (纸本)9781557529992

关键词： Four wave mixing

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Plasmonic modulator using CMOS-compatible material platform

Plasmonic modulator using CMOS-compatible material platform

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International Congress on Advanced Electromagnetic materials in Microwaves and Optics (METAmaterialS)

作者： Viktoriia E. Babicheva Nathaniel Kinsey Gururaj V. Naik Marcello Ferrera Andrei V. Lavrinenko Vladimir M. Shalaev Alexandra Boltasseva Mechanics and Optics University for Information Technology St. Petersburg Russia School of Electrical & Computer Engineering and Birck Nanotechnology Center Purdue University West Lafayette IN USA DTU Fotonik-Department of Photonics Engineering Technical University of Denmark Kgs. Lyngby Denmark Material Science and Engineering Department Currently with Stanford University Stanford CA USA School of Engineering and Physical Sciences Heriot-Watt University Edinburgh United Kingdom Russian Quantum Center Moscow region Russia

In this work, a design of ultra-compact plasmonic modulator is proposed and numerically analyzed. The device layout utilizes alternative plasmonic materials such as transparent conducting oxides and titanium nitride which potentially can be applied for CMOS compatible process. The modulation is obtained by varying the carrier concentration of the transparent conducting oxide layer and exciting plasmonic resonance in the structure. The analysis shows that an extinction ratio of 46 dB/μm can be achieved at the telecommunication wavelength. Proposed structure is particularly convenient for integration with existing insulator-metal-insulator plasmonic waveguides as well as novel photonic/electronic hybrid circuits.

关键词： Modulation Plasmons Educational institutions Optical waveguides

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Broadband optical properties of large-area monolayer CVD molybdenum disulfide

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Physical Review B 2014年第19期90卷 195434-195434页

作者： Wei Li A. Glen Birdwell Matin Amani Robert A. Burke Xi Ling Yi-Hsien Lee Xuelei Liang Lianmao Peng Curt A. Richter Jing Kong David J. Gundlach N. V. Nguyen Semiconductor and Dimensional Metrology Division National Institute of Standards and Technology Gaithersburg Maryland 20899 USA Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics Peking University Beijing 100871 China Sensors and Electron Devices Directorate US Army Research Laboratory Adelphi Maryland 20783 USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Material Sciences and Engineering National Tsing-Hua University Hsinchu 30013 Taiwan

Recently emerging large-area single-layer MoS2 grown by chemical vapor deposition has triggered great interest due to its exciting potential for applications in advanced electronic and optoelectronic devices. Unlike gapless graphene, MoS2 has an intrinsic band gap in the visible which crosses over from an indirect to a direct gap when reduced to a single atomic layer. In this paper, we report a comprehensive study of fundamental optical properties of MoS2 revealed by optical spectroscopy of Raman, photoluminescence, and vacuum ultraviolet spectroscopic ellipsometry. A band gap of 1.42 eV is determined by the absorption threshold of bulk MoS2 that shifts to 1.83 eV in monolayer MoS2. We extracted the high precision dielectric function up to 9.0 eV, which leads to the identification of many unique interband transitions at high symmetry points in the MoS2 momentum space. The positions of the so-called A and B excitons in single layers are found to shift upwards in energy compared with those of the bulk form and have smaller separation because of the decreased interactions between the layers. A very strong optical critical point predicted to correspond to a quasiparticle gap is observed at 2.86 eV, which is attributed to optical transitions along the parallel bands between the M and Γ points in the reduced Brillouin zone. The absence of the bulk MoS2 spin-orbit interaction peak at ∼3.0 eV in monolayer MoS2 is, as predicted, the consequence of the coalescence of nearby excitons. A higher energy optical transition at 3.98 eV, commonly occurring in bulk semiconductors, is associated with a combination of several critical points. Additionally, extending into the vacuum ultraviolet energy spectrum are a series of newly observed oscillations representing optical transitions from valence bands to higher conduction bands of the monolayer MoS2 complex band structure. These optical transitions herein reported enhance our understanding of monolayer MoS2 as well as of two-dimension

关键词： OPTICAL properties CHEMICAL vapor deposition MOLYBDENUM disulfide PHOTOLUMINESCENCE ELLIPSOMETRY GRAPHENE

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Insulating Ferromagnetic LaCoO3−δ Films: A Phase Induced by Ordering of Oxygen Vacancies

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Physical Review Letters 2014年第8期112卷 087202-087202页

作者： Neven Biškup Juan Salafranca Virat Mehta Mark P. Oxley Yuri Suzuki Stephen J. Pennycook Sokrates T. Pantelides Maria Varela Departamento de Física Aplicada III and Instituto Pluridisciplinar Universidad Complutense de Madrid Madrid 28010 Spain Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Department of Material Science and Engineering University of California Berkeley California 94720 USA Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics and Astronomy Vanderbilt University Nashville Tennessee 37235 USA Department of Electrical Engineering and Computer Science Vanderbilt University Nashville Tennessee 37235 USA Department of Applied Physics and Geballe Laboratory for Advanced Materials Stanford University Stanford California 94305 USA

The origin of ferromagnetism in strained epitaxial LaCoO3 films has been a long-standing mystery. Here, we combine atomically resolved Z-contrast imaging, electron-energy-loss spectroscopy, and density-functional calculations to demonstrate that, in epitaxial LaCoO3 films, oxygen-vacancy superstructures release strain, control the film’s electronic properties, and produce the observed ferromagnetism via the excess electrons in the Co d states. Although oxygen vacancies typically dope a material n-type, we find that ordered vacancies induce Peierls-like minigaps which, combined with strain relaxation, trigger a nonlinear rupture of the energy bands, resulting in insulating behavior.

关键词： FERROMAGNETIC materials LANTHANUM cobalt oxides THIN films ELECTRON energy loss spectroscopy EPITAXIAL layers OXYGEN ENERGY bands

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Integrated Source of Multiplexed Heralded Photons

Integrated Source of Multiplexed Heralded Photons

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LEOS Summer Topical Meetings

作者： Christian Reimer Lucia Caspani Matteo Clerici Marcello Ferrera Michael Kues Marco Peccianti Alessia Pasquazi Luca Razzari Brent E. Little Sai T. Chu David J. Moss Roberto Morandotti INRS-EMT Québec Canada SUPA Heriot-Watt University Edinburgh UK Department of Physics and Astronomy University of Sussex Brighton UK Xi'an Institute of Optics and Precision Mechanics of CAS Xi'an China Department of Physics and Material Science City University of Hong Kong Hong Kong China School of Electrical and Computer Engineering RMIT University Melbourne Australia

We report an integrated, CMOS-compatible source of multiplexed heralded photons, distributed over several wavelengths at standard communication channels and compatible with quantum memories. Our system operates in a s... 详细信息

关键词： Photonics Laser excitation Optical resonators Wavelength division multiplexing Standards Nonlinear optics

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Global SunFarm data acquisition network, energy CRADLE, and time series analysis

Global SunFarm data acquisition network, energy CRADLE, and ...

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2013 IEEE Energytech, Energytech 2013

作者： Hu, Yang Hosain, Mohammad A. Jain, Tarun Gunapati, Yashwanth R. Elkin, Lauren Zhang, G.Q. French, Roger H. Solar Durability and Lifetime Extension Center Department of Material Science and Engineering Case Western Reserve University Cleveland OH 44106 United States Department of Electrical Engineering and Computer Science Case Western Reserve University United States

ISBN: (纸本)9781467344449

Outdoor testing of photovoltaic (PV) modules plays a critical role in discovering the degradation modes, mechanisms and rates of materials, components and systems under real world climate conditions. The Solar Durability and Lifetime Extension (SDLE) center at Case Western Reserve University has established a highly instrumented outdoor test facility, the SDLE SunFarm. In order to study PV module performance under different climatic conditions, a global SunFarm network was established with nine PV outdoor test beds across the world. Energy CRADLE is an ontology driven database acquisition tool which is being developed to effectively store, analyze and query huge data sets generated by the SunFarms. The data collected from all these data sources will stream back to a MySQL database. A front end user interface was built for the purpose of data inquiry, equipment registration, maintenance, and metrology cross check. Design and characteristics of SunFarms are introduced. SunFarm informatics and two case studies will be discussed in this article. © 2013 IEEE.

关键词： Degradation

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Single-crystal, rare-earth doped-YAG fibers grown by the laser heated pedestal growth technique

Single-crystal, rare-earth doped-YAG fibers grown by the las...

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Frontiers in Optics, FIO 2013

作者： Nie, Craig D. Li, Yuan Cloos, Elizabeth Johnson, Eric G. Rand, Stephen C. Harrington, James A. Department of Material Science and Engineering Rutgers University Piscataway NJ 08854 United States Clemson University Clemson SC 29634 United States Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109 United States

Erbium doped single crystal YAG fibers were grown using the laser heated pedestal growth technique. The radial distribution of Erbium ions is uniform and the near-infrared ASE spectrum of the fiber was measured. ©... 详细信息

ISBN: (纸本)9781557529879

关键词： Yttrium aluminum garnet

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Investigation of transmembrane protein fused in lipid bilayer membranes supported on porous silicon

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Journal of Medical engineering and Technology 2013年第1期37卷 28-34页

作者： Tantawi, Khalid Hasan Cerro, Ramon Berdiev, Bakhrom Martin, M. Elena Diaz Montes, Francisco Javier Patel, Darayas Williams, John D. Department of Electrical and Computer Engineering University of Alabama in Huntsville Huntsville AL 35899 United States Department of Chemical and Material Science Engineering University of Alabama in Huntsville Huntsville AL 35899 United States Department of Cell Biology University of Alabama at Birmingham Birmingham AL 35294 United States Department of Chemical Engineering University of Salamanca Salamanca Spain Department of Mathematics and Computer Sciences Oakwood University Huntsville AL 35896 United States

This article investigates a device made from a porous silicon structure supporting a lipid bilayer membrane (LBM)fused with Epithelial Sodium Channel protein. The electrochemically-fabricated porous silicon template had pore diameters in the range 0.2~2 μm. Membranes were composed of two synthetic phospholipids: 1,2-diphytanoyl-sn-glycero-3-phosphoserine and 1,2-diphytanoyl-sn-glycero-3-phosphoethanolamine. The LBMwas formed by means of the Langmuir-Blodgett and Langmuir-Schaefer techniques, at a monolayer surface tension of 26 m Nm-1 in room temperature and on a deionized water subphase, which resulted in an average molecular area of 0.68-0.73 nm 2. Fusion of transmembrane protein was investigated using Atomic Force Microscopy. Initial atomic force microscopy results demonstrate the ability to support lipid bilayers fused with transmembrane proteins across a porous silicon substrate. However, more control of the membrane's surface tension using traditional membrane fusion techniques is required to optimize protein incorporation. © 2013 Informa UK, Ltd.

关键词： Atomic force microscopy

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