Open AccessPhase control of electromagnetically induced absorption in four-level atomic system
Author(s) -
Wang Li,
Gen-Quan Li,
Xiao Shao-wu,
Zheng Chang-Bo
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.8512
Subject(s) - rabi frequency , rabi cycle , absorption (acoustics) , atomic physics , field (mathematics) , coherence (philosophical gambling strategy) , physics , atomic coherence , dipole , absorption spectroscopy , phase (matter) , materials science , laser , optics , quantum mechanics , mathematics , pure mathematics , quantum
In this paper, we have calculated the absorption of the probing field in a N-type four-level atomic system with three dipole transitions using density matrix equation. The results indicate that the absorption or amplification of the probing field depends on the Rabi phases of the control field and signal field under introducing laser field Rabi phase, and the absorption or amplification periodically changes with the Rabi phases of the control field and the signal field at a period of 2π. The Rabi phase change of the probe field has no effect on the absorption. In addition, the effect of the signal field Rabi phase on absorption is the same as that of the control field Rabi phase on absorption. Rabi phase has an effect mainly on atomic coherence but little on atomic population.