Continuous control of light group velocity from subluminal to superluminal propagation with a standing-wave coupling field in a Rb vapor cell

Journal Article · Sun May 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053806· OSTI ID:21546855

Bae, In-Ho; Moon, Han Seb ^[1]

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1. Department of Physics, Pusan National University, Busan 609-735 (Korea, Republic of)

We present the continuous control of the light group velocity from subluminal to superluminal propagation with an on-resonant standing-wave coupling field in the 5S{sub 1/2}-5P{sub 1/2} transition of the {Lambda}-type system of {sup 87}Rb atoms. When a coupling field was changed from a traveling-wave to a standing-wave field by adjusting the power of a counterpropagating coupling field, the probe pulse propagation continuously transformed from subluminal propagation, due to electromagnetically induced transparency with the traveling-wave coupling field, to superluminal propagation, due to narrow enhanced absorption with the standing-wave coupling field. The group velocity of the probe pulse was measured to be approximately 0.004c to -0.002c as a function of the disparity between the powers of the copropagating and the counterpropagating coupling fields.

• OSTI ID: 21546855
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ATOMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COUPLING
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
OPACITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PULSES
RADIATIONS
RADIOISOTOPES
RUBIDIUM 87
RUBIDIUM ISOTOPES
SORPTION
STANDING WAVES
TRAVELLING WAVES
VELOCITY
VISIBLE RADIATION
YEARS LIVING RADIOISOTOPES