Large negative and positive delay of optical pulses in coherently prepared dense Rb vapor with buffer gas

Journal Article · Tue Jun 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.063808· OSTI ID:20643817

Mikhailov, Eugeniy E ^[1]; Sautenkov, Vladimir A ^[1]; Novikova, Irina ^[1]; Welch, George R ^[1]

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1. Department of Physics and Institute for Quantum Studies, Texas A and M University, College Station, Texas 77843 (United States)

We experimentally study the group time delay for a light pulse propagating through hot {sup 87}Rb vapor in the presence of a strong coupling field in a {lambda} configuration. We demonstrate that the ultraslow pulse propagation is transformed into superluminal propagation as the one-photon detuning of the light increases due to the change in the transmission resonance line shape. Negative group velocity as low as -c/10{sup 6}=-80 m/s is recorded. We also find that the advance time in the regime of the superluminal propagation grows linearly with increasing laser field power.

• OSTI ID: 20643817
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
COUPLING
LASER RADIATION
LIGHT TRANSMISSION
OPTICS
PHOTONS
PULSES
RESONANCE
RUBIDIUM 87
TIME DELAY
TUNING
VAPORS
VELOCITY
VISIBLE RADIATION