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Displaying records 21 to 30 of 47 records.
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21. Highly efficient, broadband coherent surface-mixing-wave generation using amplified surface plasmonic polaritons
Published: 5/21/2014
Authors: C. J. Zhu, X Zhao, Guoxiang Huang, Lu Deng, Edward W Hagley, Yan Ren
Abstract: We show that coherent broadband surface mixing-wave (SMW) by a hyper-Raman process can be efficiently generated near a metallic surface abutting a quasi-three-level gain medium. The generation process is significantly enhanced by the amplified surf ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915020

22. Hybrid quantum-well system for wavelength-channel selection
Published: 7/25/2013
Authors: Lu Deng, Edward W Hagley, Chengjie Zhu
Abstract: We consider a hybrid quantum-well structure consisting of regions whose properties alternate between active Raman gain and electromagnetically induced transparency. We present both analytical and numerical results that indicate a large light be ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913757

23. Imaging the Phase of an Evolving Bose-Einstein Condensate Wave Function
Published: 9/1/2000
Authors: J E Simsarian, J Denschlag, M Edwards, Charles W Clark, Lu Deng, Edward W Hagley, Kristian Helmerson, S L. Rolston, William D Phillips
Abstract: We demonstrate a spatially resolved autocorrelation measurement with a Bose-Einstein condensate (BEC) and measure the evolution of the spatial profile of its quantum mechanical phase. After releasing the BEC from the magnetic trap, the phase develop ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840445

24. Impact of photo-assisted collisions on superradiant light scattering with Bose-condensates
Published: 10/4/2012
Authors: Lu Deng, Xinyu Luo, Edward W Hagley, Ruquan Wang
Abstract: We present experimental evidence supporting the postulation that the secondary effects of light assisted collisions are the main reason that the superradiant light scattering efficiency in condensates is asymmetric with respect to the sign of the pum ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910984

25. Light-Wave Mixing in Quantum Gases
Published: 5/1/2013
Authors: Lu Deng, Edward W Hagley, R Q. Wang, Charles W Clark
Abstract: Ninety-five years after Einstein‰s theoretical prediction, we are surrounded in our daily lives by its practical applications. For example, multi-channel telecommunication lasers and even the commonly-used green laser pointers that cost just a fe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912574

26. Linear and nonlinear Faraday rotations of light polarization in a four-level active-Raman-gain medium
Published: 8/28/2013
Authors: Lu Deng, Chengjie Zhu, Edward W Hagley
Abstract: We investigate linear and nonlinear Faraday effects in a room-temperature, coherently driven four-level active- Raman-gain (ARG) medium. By using the multiple-scale method, we derive two nonlinear coupled envelope equations governing the dynami ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914050

27. 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

28. Measurement of the Coherence of a Bose-Einstein Condensate
Published: 10/1/1999
Authors: Edward W Hagley, Lu Deng, M M Kozuma, M Trippenbach, Y B Band, M Edwards, M R Doery, Paul S Julienne, Kristian Helmerson, S L. Rolston, William D Phillips
Abstract: We study the coherence properties of a Bose-Einstein condensates using an interference technique. Two 100 ns optical standing wave pulses are applied to a condensate with a variable time delay between them. Each standing wave phase grating makes sm ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840349

29. 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

30. 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



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