Acta Optica Sinica, Volume. 30, Issue 1, 251(2010)
Effects of Vacuum-Induced Coherence on the Single and Two-Photon Transparency in a Four-Level Ladder Atomic System
When the two middle levels in a four-level ladder atom are coupled with a ground and a excited levels by the same vacuum radiation fields,respectively,there are two kinds of vacuum-induced coherence (VIC):V and Λ-type VIC;due to the quantum interference effects between the spontaneous decay channels. The effects of the VIC on the electromagnetically induced single- and two-photon transparency are studied by the semiclassical theory,respectively. The Λ-type VIC enhances the two-photon absorption,but has no effect on the single photon absorption;the V-type VIC suppresses the single and two-photon absorption.
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Zeng Zhiqiang, Hou Bangpin. Effects of Vacuum-Induced Coherence on the Single and Two-Photon Transparency in a Four-Level Ladder Atomic System[J]. Acta Optica Sinica, 2010, 30(1): 251
Category: Quantum Optics
Received: Jan. 15, 2009
Accepted: --
Published Online: Feb. 1, 2010
The Author Email: Zhiqiang Zeng (zhiqiang_zeng@163.com)