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Displaying records 21 to 30 of 47 records.
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21. Observation of Collective Atomic Recoil Motion in a Degenerate Fermion Gas
Published: 5/23/2011
Authors: Lu Deng, Edward W Hagley
Abstract: We demonstrate collective atomic recoil motion with a dilute, ultracold, degenerate fermion gas in a single spin state. By utilizing an adiabatically decompressed magnetic trap with an aspect ratio different from that of the initial trap, a mom ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=920362

22. Reply to ,Comment on ,Electromagnetic Wave Dynamics in Matter-Wave Superradiant ScatteringŠ by Wolfgang Ketterle
Published: 3/18/2011
Authors: Lu Deng, Edward W Hagley, Marvin G. Payne
Abstract: The comment by W. Ketterle [1] purports having a viable model of superradiance. However, Ref. [1] admits not being able to explain the red/blue pump detuning asymmetry in matter-wave superradiance that was first observed recently by us [2]. It is cle ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906633

23. Observation of the red-blue detuning asymmetry in matter-wave superradiance
Published: 11/23/2010
Authors: Lu Deng, Edward W Hagley, Qiang Cao, Xiaorui Wang, Xinyu Luo, Ruquan Wang, Fan Yang, Xiaoji Zhou, Xuzong Chen, M. G. Payne, Mingsheng Zhan
Abstract: We show the first experimental observations of matter-wave superradiance using blue-detuned light, and demonstrate a pump-laser detuning asymmetry in the collective atomic recoil motion. In contrast to all previous theoretical treatments, which p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905929

24. A Green Laser Pointer Hazard
Series: Technical Note (NIST TN)
Report Number: 1668
Published: 8/2/2010
Authors: Jemellie Galang, Alessandro Restelli, Edward W Hagley, Charles W Clark
Abstract: An inexpensive green laser pointer was found to emit 20 mW of infrared radiation during normal use. This is potentially a serious hazard that would not be noticed by most users of such pointers. We find that the problem derives from an unsafe desig ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906138

25. Matter-wave self-imaging in non-Raman-Nath regime pulsed standing optical wave
Published: 12/18/2008
Authors: Ke Li, Lu Deng, Edward W Hagley, M.S. Zhan, M Payne
Abstract: We demonstrate matter-wave self-imaging in a stationary light field in the non-Raman-Nath limit. We show that in a non-instantaneous pulsed standing wave grating significant contributions due to the non-negligible atomic center of mass motion and ins ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842522

26. A Fast-Responding Nonlinear Phase Shifter Using an Active Raman Gain Core
Published: 4/22/2008
Authors: Lu Deng, Edward W Hagley, Kaijun Jiang, M Payne
Abstract: Using a lifetime broadened N-scheme with an active-Raman-gain (ARG) Lambda core, we show that large nonlinear phase shift can be induced without signal wave attenuation. The new scheme is not based on the ultra-slow-wave technique and it does not ex ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840272

27. Formation and propagation of matched and coupled ultraslow optical soliton pairs in a four-level double-Lambda system
Published: 11/17/2005
Authors: Lu Deng, M G Payne, G X Huang, Edward W Hagley
Abstract: We investigate the simultaneous formation and stable propagation of ultraslow optical soliton pairs in a lifetime broadened four-state atomic system under double- excitation with large one- and two- photon detunings. We show that detrimental pr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101495

28. Ultraviolet single-photons on demand and entanglement of photons with a large frequency difference
Published: 12/20/2004
Authors: Lu Deng, Edward W Hagley, M. G. Payne, Ying Wu
Abstract: We investigate an efficient scheme for generating ultraviolet single-photons s,300 nmd. The scheme combines the highly efficient single-photon four-wave mixing scheme and fast developing quantum dot singlephotons on demand source technology. We ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=920377

29. Propagation Dynamics of a Temporally, Amplitude- and Group-Velocity-Matched Two-Mode Ultraslow Wave in a Three-Level Lamda System
Published: 12/1/2004
Authors: Lu Deng, M Payne, Edward W Hagley
Abstract: We investigate the propagation dynamics of a two-mode probe field traveling with ultra-slow group velocities. We show that a strong cross-beam coupling occurs between the two modes of the probe wave. In the adiabatic limit and under appropriate con ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840172

30. Quantum Key Distribution With 1.25 Gbps Clock Synchronization
Published: 5/1/2004
Authors: Joshua C Bienfang, Alex J Gross, Alan Mink, Barry J. Hershman, Anastase Nakassis, Xiao Tang, David H Su, Charles W Clark, Carl J Williams, Edward W Hagley, J Wen, R Lu
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840186



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