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You searched on: Author: alan migdall

Displaying records 151 to 160 of 198 records.
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151. Absolute Quantum Efficiency Measurements Using Correlated Photons: Toward a Measurement Protocol
Published: 1/1/2001
Author: Alan L Migdall

152. Simultaneous Measurement of Group and Phase Delay Between Two Photons
Published: 12/1/2000
Authors: D A Branning, Alan L Migdall, A V Sergienko
Abstract: We report on an experiment to determine both the group and phase delays experienced by orthogonally polarized photon pairs travelling through a birefringent medium. Both types of delay are determined from the same set of coincidence-counting data. Th ...

153. Ultrafast Terahertz Spectroscopy: Measuring Low-Frequency Vibrational Modes of Hydrogen-Bonded Systems
Published: 7/1/2000
Authors: D A McWhorter, Alan L Migdall, Edwin J Heilweil
Abstract: An ultrafast terahertz spectrometer using ZnTe crystals for optical rectification and free-space electro-optic sampling has been developed to measure vibrational dynamics of biological molecules. Spectrometer characteristics and absorption spectra o ...

154. Infrared Spectral Responsivity Scale of NIST
Published: 5/1/2000
Authors: George P Eppeldauer, Alan L Migdall
Abstract: An ambient temperature Infrared Spectral Responsivity Comparator Facility has been developed at NIST to calibrate infrared detectorsand radiometers for spectral and spatial responsivities. Test detectors are substituted for working- or transfer-stan ...

155. Calculating Characteristics of Non-collinear Phase-Matching in Uniaxial and Biaxial Crystals
Published: 4/1/2000
Authors: N Boeuf, D A Branning, I Chaperot, E Dauler, S Guerin, G Jaeger, Andreas Muller, Alan L Migdall
Abstract: A method of calculating the characteristics of phase-matching in both uniaxial and biaxial crystals is presented. Although significant work has been done to characterize the collinear case of phase-matching and to present many of its applications, t ...

156. Observation of Photons From an Inhibited Spontaneous Emitter
Published: 2/1/2000
Authors: D A Branning, Alan L Migdall
Abstract: A fun and timely problem in cavity quantum electrodynamics is the question of whether atoms are actually radiating anything when their spontaneous emission is inhibited by a cavity. Recent theoretical papers have indicated that the answer to this que ...

157. Calculating Characteristics of Noncollinear Phase Matching in Uniaxial and Biaxial Crystals
Published: 1/1/2000
Authors: N Boeuf, D A Branning, I Chaperot, E Dauler, S Guerin, G Jaeger, Andreas Muller, Alan L Migdall

158. Using Correlated Photons to Measure Polarization Mode Dispersion with Attosecond Resolution
Published: 12/1/1999
Authors: Alan L Migdall, G Jaeger, A V Sergienko
Abstract: We describe the status of a highly stable dual scale technique for measuring polarization mode dispersion (PMD) using two-photons produced via parametric down conversion. The method uses a two-photon interference to observe relative propagation time ...

159. Differences Explained in Correlated-Photon Metrology Techniques
Published: 11/1/1999
Author: Alan L Migdall

160. Migdall Responds II: More Correlated Photon Metrology History
Published: 11/1/1999
Author: Alan L Migdall
Abstract: I appreciate the comments of Mike Gruntman (Sept., page 80) concerning the history of using correlated pairs of particles(photons) to determine absolute detector quantum efficiencies. Unfortunately there is an overall misunderstanding of the techniqu ...

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