Phase control of group velocity in a dielectric slab doped with three-level ladder-type atoms

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.063811· OSTI ID:22095701

Jafari, D. ^[1]; Sahrai, M. ^[2]; Motavalli, H. ^[1]; Mahmoudi, M. ^[3]

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1. Department of Physics, University of Tabriz, Tabriz (Iran, Islamic Republic of)
2. Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz (Iran, Islamic Republic of)
3. Department of Physics, University of Zanjan, P.O. Box 45195-313, Zanjan (Iran, Islamic Republic of)

Propagation of an electromagnetic pulse through a dielectric slab doped with three-level ladder-type atomic systems is discussed. It is shown that the group velocity of the reflected and transmitted pulses can be switched from subluminal to superluminal light propagation by the thickness of the slab or the intensity of the coupling field. Furthermore, it is found that, in the presence of quantum interference, the reflected and transmitted pulses are completely phase dependent. So, the group velocity of the reflected and transmitted pulses can only be switched from subluminal to superluminal by adjusting the relative phase of the applied fields.

• OSTI ID: 22095701
• Journal Information: Physical Review. A, Vol. 84, Issue 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
COUPLING
DIELECTRIC MATERIALS
DOPED MATERIALS
ELECTROMAGNETIC PULSES
ENERGY LEVELS
INTERFERENCE
LIGHT TRANSMISSION
SLABS
THICKNESS
VELOCITY