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Topic Area: Physics

Displaying records 81 to 90 of 763 records.
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81. Demonstration of a dressed-state phase gate for trapped ions
Topic: Physics
Published: 6/28/2013
Authors: Ting Rei Tan, John P Gaebler, Ryan Steven Bowler, Yiheng Lin, John D. Jost, Dietrich G Leibfried, David J Wineland
Abstract: We demonstrate a trapped ion entangling gate scheme proposed by Bermudez et~al [Phys. Rev. A 85, 040302 (2012)]. Simultaneous excitation of a strong carrier and a single sideband transition enables deterministic creation of entangled states. The meth ...

82. Spectral responsivity based calibration of photometer and colorimeter standards
Topic: Physics
Published: 6/19/2013
Author: George P Eppeldauer
Abstract: Several new generation transfer- and working-standard illuminance meters and tristimulus colorimeters have been developed at the National Institute of Standards and Technology (NIST) to measure all kinds of light sources with low uncertainty. The spe ...

83. Laser-Machined Ultra-High-Q Microrod Resonators for Nonlinear Optics
Topic: Physics
Published: 6/7/2013
Authors: Pascal Patrice Del'Haye, Scott B Papp, Scott A Diddams
Abstract: Optical whispering-gallery microresonators are useful tools in microphotonics, and non-linear optics at very low threshold powers. Here, we present details about the fabrication of ultra-high-Q whispering-gallery-mode (WGM) resonators made by CO2-las ...

84. Classical over-the-barrier model for neutralization of highly charged ions above thin dielectric films
Topic: Physics
Published: 6/3/2013
Authors: Joshua M Pomeroy, Russell Lake, C E Sosolik
Abstract: We apply the classical over-the-barrier model (COB) to charge transfer between highly charged ions (HCIs)and targets consisting of thin dielectric films on metals. Distances for the onset of classically allowed above surface electron capture are ...

85. Lattice damage in superconducting microcalorimeter detectors
Topic: Physics
Published: 6/3/2013
Authors: Robert Daniel Horansky, Joel Nathan Ullom, Michael W Rabin
Abstract: There is currently significant interest in using superconducting detectors for measurement of ion kinetic energies. Unprecedented resolution is possible with an order of magnitude improvement over semiconductors. Superconducting detectors are now ...

86. Foreword to Book entitled Synchronous Ethernet and IEEE-1588 in Telecoms Sub Title: Next generation synchronization networks
Topic: Physics
Published: 6/1/2013
Author: Marc A Weiss
Abstract: Network synchronization or timing, as it is sometimes called, has always been an important subject since the advent of digital switching and transmission based around Time Division Multiplexing (TDM) technology. Synchronization is a fundamental found ...

87. Analysis of shot noise in the detection of ultrashort optical pulse trains
Topic: Physics
Published: 5/31/2013
Authors: Franklyn J Quinlan, Tara Michele Fortier, Haifeng (Haifeng) Jiang, Scott A Diddams
Abstract: We present a frequency domain model of shot noise in the photodetection of ultrashort optical pulse trains using a time-varying analysis. Shot noise-limited photocurrent power spectral densities, signal-to-noise expressions, and shot noise spectral c ...

88. Modulated photocurrent spectroscopy of CdTe/CdS solar cells-equivalent circuit analysis
Topic: Physics
Published: 5/20/2013
Authors: Behrang H Hamadani, John F Roller, Kounavis Panagiotis, Nikolai B Zhitenev, David J Gundlach
Abstract: We have used the technique of photocurrent modulated spectroscopy to investigate the dynamic response of charge carrier transport in thin film CdTe/CdS solar cells as a function of light bias and temperature over a broad excitation frequency range. T ...

89. Photonic microwave generation with high-power photodiodes
Topic: Physics
Published: 5/14/2013
Authors: Tara Michele Fortier, Franklyn J Quinlan, Archita Hati, Craig W Nelson, Jennifer A. Taylor, Yang Fu, Joe Campbell, Scott A Diddams
Abstract: We utilize and characterize high-power, high-linearity modified uni-traveling carrier (MUTC) photodiodes for low-phase-noise photonic microwave generation based on optical frequency division. When illuminated with 980 nm picosecond pulses from a repe ...

90. Controlling the Competition between Optically Induced Ultrafast Spin-Flip Scattering and Spin Transport in Magnetic Multilayers
Topic: Physics
Published: 5/7/2013
Authors: Justin M Shaw, Hans T. Nembach, Thomas J Silva, Margaret M. Murnane, Henry C. Kapteyn, Martin Aeschlimann, Claus M. Schneider, Emrah Turgut, Stefan Mathias, Patrik Grychtol, Chan La-O-Vorakiat, Dennis Rudolf, Roman Adam
Abstract: The study of ultrafast dynamics in magnetic materials provides rich opportunities for greater fundamental understanding of correlated phenomena in solid-state matter, because many of the basic microscopic mechanisms involved are as-yet unclear and ar ...

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