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Displaying records 31 to 40 of 46 records.
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31. Quasianalytical modal approach for computing Casimir interactions in periodic nanostructures
Topic: Optical Physics
Published: 10/3/2012
Authors: Francesco Intravaia, Paul S Davids, Ricardo Decca, Vladimir A Aksyuk, Daniel Lopez, Diego A. R. Dalvit
Abstract: We present an almost fully analytical technique for computing Casimir interactions between 1D periodic lamellar gratings based on a modal approach. Our method improves on previous work on Casimir modal approaches for nanostructures by using the exa ...

32. Random testing reveals excessive power in commercial laser pointers
Topic: Optical Physics
Published: 5/1/2013
Authors: Joshua Aram Hadler, Edna L Tobares, Marla L Dowell
Abstract: In random testing of 122 commercial laser pointers, we observed that 89.7 % of green pointers and 44.4 % of red pointers were not in compliance with the Code of Federal Regulations, producing laser power in excess of the Accessible Emission Limit at ...

33. Real-time polarization microscopy for probing local distributions of biomolecules
Topic: Optical Physics
Published: 2/28/2011
Authors: Jeeseong Hwang, Ji Y. Lee, John F. Lesoine, Hyeong Gon Kang, Matthew Lawrence Clarke, Robert C. Chang
Abstract: We present real-time, full-field, fluorescence polarization microscopy and its calibration and validation methods to monitor the absorption dipole orientation of fluorescent molecules. A quarter-wave plate, in combination with a liquid crystal varia ...

34. Remote sensing of chiral signatures on Mars
Topic: Optical Physics
Published: 11/1/2012
Authors: William Sparks, James H. Hough, Thomas Avery Germer, Frank Robb, Ludmilla Kolokolova
Abstract: We describe circular polarization as a remote sensing diagnostic of chiral signatures which may be applied to Mars. The remarkable phenomenon of homochirality provides a unique biosignature which can be amenable to remote sensing through circular ...

35. Scatterfield Optical Imaging for sub-10 nm Dimensional Metrology
Topic: Optical Physics
Published: 1/1/2009
Author: Richard M Silver
Abstract: Recent developments in optical microscopy promise to advance optical metrology and imaging to unprecedented levels through theoretical and experimental development of a new measurement technique called "scatterfield optical imaging". ". Current met ...

36. Sensitivity Comparison of Mx and Frequency Modulated Bell-Bloom Cs Magnetometers in a Micro-Fabricated Cell
Topic: Optical Physics
Published: 2/1/2010
Authors: Ricardo Jimenez Martinez, William C. Griffith, Ying-ju Wang, Svenja A Knappe, John E Kitching, Ken Smith, Mark Prouty
Abstract: We compare the sensitivity performance of two optically pumped atomic magnetometers based on the Mx and frequency-modulated Bell-Bloom configurations. The Cs magnetometers are implemented using a millimeter-scale microfabricated vapor cell in a confi ...

37. Single-Photon Sources and Detectors Book: Chapter 1: Introduction
Topic: Optical Physics
Published: 11/29/2013
Authors: Joshua C Bienfang, Jingyun Fan, Alan L Migdall, Sergey V Polyakov
Abstract: In the beginning there was light. And it was good. Not long thereafter people began to look for a comprehensive understanding of its nature. While the publication record starts o a little spotty, in the fth century BC the Greek philosopher Empedocl ...

38. Spectral response and characterization of a high-efficiency upconvertor for single-photon-level detection
Topic: Optical Physics
Published: 10/18/2013
Authors: Paulina S Kuo, Oliver T Slattery, Yong-Su Kim, Jason S. Pelc, M. M. Fejer, Xiao Tang

39. Spectral response of an upconversion detector and spectrometer
Topic: Optical Physics
Published: 9/17/2013
Authors: Paulina S Kuo, Oliver T Slattery, Yong-Su Kim, Jason S. Pelc, M. M. Fejer, Xiao Tang
Abstract: We theoretically and experimentally investigate the spectral response of an upconversion detector and discuss implications for its use as an infrared spectrometer. Upconversion detection is based on high-conversion-efficiency sum-frequency generation ...

40. Stimulated Generation of Superluminal Light Pulses via Four-wave Mixing
Topic: Optical Physics
Published: 4/26/2012
Authors: Ryan Thomas Glasser, Ulrich Vogl, Paul D Lett
Abstract: We report on the four-wave mixing of superluminal pulses, in which both the injected and generated pulses involved in the process propagate with negative group velocities. Generated pulses with negative group velocities of up to vg = −c/880 ar ...

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