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Topic Area: Physics
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Displaying records 11 to 20 of 731 records.
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11. An optically-modulated zero-field atomic magnetometer with suppressed spin-exchange broadening
Topic: Physics
Published: 4/29/2014
Authors: Ricardo Jimenez Martinez, Svenja A Knappe, John E Kitching
Abstract: We implement an optically-pumped 87Rb magnetometer based on a zero-field dispersive resonance enabled by the optical modulation of the 87Rb ground state energy levels. The magnetometer is operated in the spin-exchange relaxation-free regime where hig ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914207

12. Time-resolved double-slit interference pattern measurement with entangled photons
Topic: Physics
Published: 4/28/2014
Authors: Lynden Krister Shalm, Thomas Jennewein, Kevin Resch, Piotr Kolenderski, Carmelo Scarcella, Kelsey D. Johnsen Johnsen, Deny Hamel, Cahterine Holloway, Simone Tisa, Alberto Tosi
Abstract: The double-slit experiment strikingly demonstrates the wave-particle duality of quantum objects. In this famous experiment, particles pass one-by-one through a pair of slits and are detected on a distant screen. A distinct wave-like pattern emerg ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913512

13. Sensor Calibration and Characterization to Meet Climate Monitoring Requirements
Topic: Physics
Published: 4/24/2014
Authors: Catherine C Cooksey, Gerald T Fraser, Howard W Yoon
Abstract: The challenge of detecting small changes in the Earth's climate system over decadal and longer time scales places stringent requirements on environmental monitoring systems. Sensors must be well calibrated and maintain their calibration in challengin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915271

14. Preparation of nanocomposite plasmonic films made from cellulose nanocrystals or mesoporous silica decorated with unidirectionally aligned gold nanorods
Topic: Physics
Published: 4/11/2014
Authors: Michael Campbell, Qingkun Liu, Aric Warner Sanders, Julian Evans, Ivan I. Smalyukh
Abstract: Using liquid crystalline self-assembly of cellulose nanocrystals, we achieve long-range alignment of anisotropic metal nanoparticles in colloidal nanocrystal dispersions that are then used to deposit thin structured films with ordering features h ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915636

15. The hyperfine Paschen-Back Faraday effect
Topic: Physics
Published: 3/26/2014
Authors: Svenja A Knappe, M.A. Zentile, Rebecca Andrews, L. Weller, C.S. Adams, I.G. Hughes
Abstract: We investigate experimentally and theoretically the Faraday effect in an atomic medium in the hyperfine Paschen-Back regime, where the Zeeman interaction is larger than the hyperfine splitting. We use a small permanent magnet and a micro-fabricated ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915173

16. Dual-polarization-sensitive kinetic inductance detectors for balloon-borne, sub-millimeter polarimetry
Topic: Physics
Published: 3/20/2014
Authors: James A Beall, Daniel T Becker, Justus A Brevik, Hsiao-Mei Cho, Gene C Hilton, Kent D Irwin, Dale Li, David P Pappas, Jeffrey Lee Van Lanen, Johannes Hubmayr
Abstract: We are developing arrays of kinetic inductance detectors for sub-millimeter polarimetry that will be deployed on the BLAST balloon-borne instrument. The array is feedhorn-coupled, and each pixel contains two lumped-element kinetic inductance dete ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914331

17. Optical amplification and pulse interleaving for low noise photonics microwave generation
Topic: Physics
Published: 3/12/2014
Authors: Franklyn J Quinlan, Frederick Nicholas Baynes, Tara Michele Fortier, Qiugui Zhou, Allen Cross, Joe Campbelll, Scott A Diddams
Abstract: We investigate the impact of pulse interleaving and optical amplification on the spectral purity of microwave signals generated by photodetecting the pulsed output of an Er:fiber-based optical frequency comb. It is shown that the microwave phase nois ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915084

18. WWVB: A Half Century of Delivering Accurate Frequency and Time by Radio
Series: Journal of Research (NIST JRES)
Report Number: 119.004
Topic: Physics
Published: 3/12/2014
Authors: Michael A Lombardi, Glenn K Nelson
Abstract: In commemoration of its 50th anniversary of broadcasting from Fort Collins, Colorado, this paper provides a history of National Institute of Standards and Technology (NIST) radio station WWVB. The narrative describes the evolution of the station ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914782

19. Spin dephasing as a probe of Mmde temperature, motional state distributions, and heating rates in a two-dimensional ion crystal
Topic: Physics
Published: 3/10/2014
Authors: Brian C Sawyer, Joseph Wright Britton, John J Bollinger
Abstract: We employ spin-dependent optical dipole forces to characterize the transverse center-of-mass (COM) motional mode of a two-dimensional trapped ion crystal of hundreds of ^u9^Be^u+^. By comparing the measured spin dephasing produced by the spin-depende ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915134

20. A collapse of the cross-spectral function in phase noise metrology
Topic: Physics
Published: 2/25/2014
Authors: Craig W Nelson, Archita Hati, David Allan Howe
Abstract: Cross-spectral analysis is a mathematical tool for extracting the power spectral density of a correlated signal from two time series in the presence of uncorrelated interfering signals. We demonstrate and explain a set of conditions where the detect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914586



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