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1. A Dynamic, Ultra-Slow Optical-Matter Wave Analog of Event Horizon
C. J. Zhu, Lu Deng, Edward W Hagley, Mo-Lin Ge
We investigate effects of a dynamically increasing medium index to optical-wave propagation
in a rubidium condensate. A long pulsed pump lasaer coupling a D2 line transition produces a
rapidly-growing internally-generated field. This results in a s ...
2. A Fast-Responding Nonlinear Phase Shifter Using an Active Raman Gain Core
Lu Deng, Edward W Hagley, Kaijun Jiang, M Payne
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 ...
3. A Green Laser Pointer Hazard
Technical Note (NIST TN)
Jemellie Galang, Alessandro Restelli, Edward W Hagley, Charles W Clark
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 ...
4. A High Speed Quantum Communication Testbed
Carl J Williams, X Tang, M Hiekkero, J Rouzaud, R Lu, A Goedecke, Alan L Migdall, A Mink, A Nakassis, Leticia S Pibida, J Wen, Edward W Hagley, Charles W Clark
5. A Well Collimated Quasi-Continuous Atom Laser
Edward W Hagley, Lu Deng, M M Kozuma, J Wen, Kristian Helmerson, S L. Rolston, William D Phillips
We demonstrate extraction of sodium atoms from a trapped Bose-Einstein condensate (BEC) using a coherent stimulated Raman process. Optical Raman pulses drive transitions between trapped and untrapped magnetic sublevels so as to give the output coupl ...
6. Coherence Properties of an Atom Laser
M Trippenbach, Y B Band, M Edwards, M R Doery, Paul S Julienne, Edward W Hagley, Lu Deng, M M Kozuma, Kristian Helmerson, S L. Rolston, William D Phillips
We study the coherence properties of an atom laser, which operates by extracting atoms from a gaseous Bose-Einstein condensate via a two-photon Raman process, by analyzing a recent experiment [(Hagley et al., submitted to Phys. Rev. Lett. (1999)]. W ...
7. Coherent Splitting of Bose-Einstein Condensed Atoms With Optically Induced Bragg Diffraction
M M Kozuma, Lu Deng, Edward W Hagley, J Wen, R Lutwak, Kristian Helmerson, S L. Rolston, William D Phillips
We exposed Bose-Einstein condensed sodium atoms to a traveling periodic optical potential and observed coherent splitting of the condensate due to Bragg diffraction. Using the momentum selectivity of the scattering, we were able to separate a compon ...
8. Dynamic Onset of Feynman Relation in the Phonon
Lu Deng, Edward W Hagley, Yan Li, Chengjie Zhu
The Feynman relation 1, a much celebrated condensed matter physics gemstone for more
than 70 years, predicts that the density excitation spectrum and structure factor of a
Bosonic system in the phonon regime drops linear and continuousl ...
9. Dynamic light deflection in an active Raman-gain medium using a spatially inhomogeneous pump
Lu Deng, Edward W Hagley, Chengjie Zhu
We study optical wave deflection in a three-level active Raman gain medium using a spatially
pump field. Using the eikonal approximation, we derive an analytical expression for the
deflection angle and
demonstrate more than an ord ...
10. Effect of atomic coherence on "temporal cloaking" in atomic vapors
Runbing Li, Lu Deng, Edward W Hagley, Joshua C Bienfang, M G Payne, Mo-Lin Ge
We discuss a different scheme to achieve temporal cloaking in warm atomic vapors. Instead of
creating a temporal-spatial window in a patched broadband short optical pulse using static
differential dispersion of an optical fiber, we create a tempo ...