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Topic Area: Optical Physics
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Displaying records 31 to 40 of 67 records.
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31. Modulated photocurrent spectroscopy of CdTe/CdS solar cells-equivalent circuit analysis
Topic: Optical 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912092

32. NIST Technical Note No. 1621: Optical radiation measurements based on detector standards
Series: Technical Note (NIST TN)
Report Number: 1621
Topic: Optical Physics
Published: 3/11/2009
Author: George P Eppeldauer
Abstract: Improved detector technology in the past two decades opened a new era in the field of optical radiation measurements. Lower calibration and measurement uncertainties can be achieved with modern detector/radiometer standards than traditionally used s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901369

33. Nanosecond-scale timing jitter in transition edge sensors at telecom and visible wavelengths
Topic: Optical Physics
Published: 6/10/2013
Authors: Antia A. Lamas-Linares, Brice R. Calkins, Nathan A Tomlin, Thomas Gerrits, Adriana Eleni Lita, Joern Beyer, Richard P Mirin, Sae Woo Nam
Abstract: Transition edge sensors (TES) have the highest reported efficiencies (> 98%) for single photon detection in the visible and near infrared. Experiments in quantum information and foundations of physics that rely on this efficiency have started incor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911942

34. Nested Uncertainties and Hybrid Metrology to Improve Measurement Accuracy
Topic: Optical Physics
Published: 4/18/2011
Authors: Richard M Silver, Nien F Zhang, Bryan M Barnes, Hui H. Zhou, Jing Qin, Ronald G Dixson
Abstract: In this paper we present a method to combine measurement techniques that reduce uncertainties and improve measurement throughput. The approach has immediate utility when performing model-based optical critical dimension measurements. When modeling ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908290

35. Off-line monitoring of OSNR/CD/PMD degradation effects using neural-network-based training sequences
Topic: Optical Physics
Published: 9/1/2008
Authors: Jeffrey A Jargon, Xiaoxia Wu, Alan Willner
Abstract: A technique using artificial neural networks to simultaneously identify OSNR, CD, and PMD from eye-diagram parameters is demonstrated both via simulation and experimentally in 40 Gb/s OOK and DPSK systems. A correlation coefficient of 0.99 is obtaine ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33017

36. On-chip, photon-number-resolving, telecom-band detectors for scalable photonic information processing
Topic: Optical Physics
Published: 7/30/2012
Authors: Thomas Gerrits, Nick Thomas-Peter, James Gates, Adriana Eleni Lita, Benjamin Metcalf, Brice R. Calkins, Nathan A Tomlin, Anna R.E. Fox, Antia A. Lamas-Linares, Justin Spring, Nathan Langford, Richard P Mirin, Peter Smith, Ian Walmsley, Sae Woo Nam
Abstract: We demonstrate the operation of an integrated photon number resolving transition edge sensor (TES), operating in the telecom band at 1550 nm, employing an evanescently coupled design that allows the detector to be placed at arbitrary locations within ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911599

37. Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene
Topic: Optical Physics
Published: 8/6/2009
Authors: Hongki Min, Allan H. MacDonald
Abstract: We predict that the optical conductivity of normal graphene multilayers is close to {sigma}^duni^=({pi}/2) e^u2^/h per layer over a broad range of frequencies. The origin of this behavior is an emergent chiral symmetry which is present in normal N-l ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902107

38. Performance of the NIST goniometer with a broad-band source and multichannel CCD based spectrometer
Topic: Optical Physics
Published: 9/20/2012
Authors: Vyacheslav B Podobedov, Maria E Nadal, Carl C Miller
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909880

39. Photon-number uncertainty in a superconducting transition-edge sensor beyond resolved-photon-number determination
Topic: Optical Physics
Published: 9/10/2014
Authors: Zachary H Levine, Boris L. Glebov, Alan L Migdall, Thomas Gerrits, Brice R. Calkins, Adriana Eleni Lita, Sae Woo Nam
Abstract: As part of an effort to extend fundamental single-photon measurements into the macroscopic regime, we explore how best to assign photon-number uncertainties to output waveforms of a superconducting Transition Edge Sensor (TES) and how those assignmen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916283

40. Polarization Directions of Non-Collinear Phase Matched Optical Parametric Down-Conversion Output
Topic: Optical Physics
Published: 5/1/1997
Author: Alan L Migdall
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104040



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