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Displaying records 501 to 510 of 789 records.
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501. A microfabricated photonic magnetometer
Topic: Physics
Published: 10/26/2008
Authors: Jan Preusser, Vladislav Gerginov, Svenja A Knappe, John E Kitching
Abstract: An integrated optically-controlled sensor, suitable for remote, high-sensitivity detection of magnetic fields is presented. The sensor head is free of electrical currents or metal parts, therefore eliminating distortion of the magnetic fields to be m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842525

502. Design and Demonstration of PECVD Angled Multilayer Dielectric Mirrors Optimized for Micromachined Cavity Sidewalls
Topic: Physics
Published: 10/25/2008
Authors: M.A. Perez, John E Kitching, A Shkel
Abstract: This paper reports on the design and implementation of high efficiency, non-metallic reflectors integrated on the sidewalls of micromachined cavities. Due to shadowing from deposition within a cavity, significant variation in the thicknesses of the d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842528

503. Alpha-Dot or Not: Comparison of Two Single Atom Optical Clocks
Topic: Physics
Published: 10/5/2008
Authors: Till P Rosenband, David Hume, Chin W. Chou, J.C. Koelemeij, A. Brusch, Sarah Bickman, Windell Oskay, Tara Michele Fortier, Jason Stalnaker, Scott A Diddams, Nathan Reynolds Newbury, William C Swann, Wayne M Itano, David J Wineland, James C Bergquist
Abstract: Repeated measurements of the frequency ratio of Hg^u+^ and Al^u+^ single-atom optical clocks over the course of a year yield a constraint on the possible temporal variation of the fine-structure constant a. The time variation of the measured ratio c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901534

504. Chip-scale atomic devices: precision atomic instruments based on MEMS
Topic: Physics
Published: 10/5/2008
Authors: John E Kitching, Svenja A Knappe, Vladislav Gerginov, Vishal Shah, Peter D. Schwindt, Brad Lindseth, Elizabeth A Donley, Ying-ju Wang, Eleanor Hodby, Matt Eardley, Ricardo Jimenez Martinez, William C. Griffith, Andrew Geraci, Jan Preusser, Tara C. Liebisch, Hugh Robinson, Leo Hollberg
Abstract: We describe recent work at NIST to develop compact, low-power instruments based on a combination of precision atomic spectroscopy, advanced diode lasers and microelectromechanical systems (MEMS). Designed to be fabricated in parallel in large numbe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901006

505. NIST F1 and F2
Topic: Physics
Published: 10/5/2008
Authors: Thomas Patrick Heavner, Thomas Edward Parker, Jon Hardy Shirley, Steven R Jefferts
Abstract: The National Institute of Standards and Technology operates a cesium fountain primary frequency standard, NIST-F1, which has been contributing to International Atomic Time (TAI) since 1999. At the time of the last Symposium on Frequency Standards an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901130

506. Weight Functions for Biases in Atomic Frequency Standards
Topic: Physics
Published: 10/5/2008
Author: Jon Hardy Shirley
Abstract: We present a unified treatment of frequency-standard biases that vary significantly during the time of measurement. We introduce three time-dependent weight functions built from the solution of the unperturbed equations of motion for a two-level sys ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900983

507. Recent atomic clock comparisions at NIST
Topic: Physics
Published: 10/1/2008
Authors: Luca Lorini, Neil Ashby, Anders Brusch, Scott A Diddams, Robert E. Drullinger, Eric Eason, Tara Michele Fortier, Pat Hastings, Thomas Patrick Heavner, David Hume, Wayne M Itano, Steven R Jefferts, Nathan Reynolds Newbury, Thomas Edward Parker, Till P Rosenband, Jason Stalnaker, William C Swann, David J Wineland, James C Bergquist
Abstract: The record of atomic clock frequency comparisons at NIST over the past half-decade provides one of the tightest constraints of any present-day, temporal variations of the fundamental constants. Notably, the 6-year record of increasingly precise measu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842476

508. Ratio of the Al^u+^ and Hg^u+^ Optical Clock Frequencies to 17 Decimal Places
Topic: Physics
Published: 8/25/2008
Authors: Wayne M Itano, Till P Rosenband, David Hume, P.O. Schmidt, Chin W. Chou, A. Brusch, Luca Lorini, Windell Oskay, Robert E. Drullinger, Sarah Bickman, Tara Michele Fortier, Jason Stalnaker, Scott A Diddams, William C Swann, Nathan Reynolds Newbury, David J Wineland, James C Bergquist
Abstract: Frequency standards (atomic clocks) based on narrow optical transitions in ^u27^Al^u+^ and ^u199^Hg^u+^ have been developed over the past several years at NIST. These two types of standards are both based on single ions confined in Paul traps, but di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842568

509. Passively mode-locked 10 GHz femtosecond Ti:sapphire laser
Topic: Physics
Published: 8/15/2008
Authors: A Bartels, Dirk Heinecke, Scott A Diddams
Abstract: We report a mode-locked Ti:sapphire femtosecond laser emitting pulses as short as 42 fs at 10 GHz repetition rate. When operated with a spectrally-integrated average power greater than 1 W, the associated femtosecond laser frequency comb (FLFC) cont ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842491

510. Quantum Computing With Ions
Topic: Physics
Published: 8/1/2008
Authors: David J Wineland, C Monroe
Abstract: This article briefly describes methods to generate entanglement and implement quantum information processing with the use of trapped ions. It is intended to give a simple introduction to the techniques involved, the status of the field and indicate f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842478



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