Influence of Doppler-broadening on absorption-dispersion properties in a resonant coherent medium
Xu Wei-Hua (徐卫华)a, Gao Jin-Yue (高锦岳)b
a Department of Physics, College of Science, Shenzhen University,Shenzhen 518060, China; b Key Laboratory for Coherent Light, Atomic and Molecular Spectroscopy of Education Ministry, College of Physics, Jilin University, Changchun 130023, China
Abstract We investigate the influence of Doppler broadening on absorption-dispersion properties in a four-level atomic system that can evolve from a normal dispersion to an anomalous dispersion. Our results show that the absorption-dispersion properties become strongly dependent on the propagation directions of the applied fields if Doppler broadening is taken into account. Especially, the switchover in the sign of the dispersion is still achievable even in the presence of Doppler broadening if properly arranging the propagation directions of the applied fields, which is in contrast with the otherwise behaviours in some other configurations.
Received: 11 May 2005
Revised: 16 June 2005
Accepted manuscript online:
(Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)
Fund: Project supported by the SZU R/D Fund (Grant No 200549).
Cite this article:
Xu Wei-Hua (徐卫华), Gao Jin-Yue (高锦岳) Influence of Doppler-broadening on absorption-dispersion properties in a resonant coherent medium 2005 Chinese Physics 14 2496
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