Inhibition of Two-Photon Absorption in a Four-Level Atomic System with Closed-Loop Configuration
Inhibition of Two-Photon Absorption in a Four-Level Atomic System with Closed-Loop Configuration作者机构：Department of Physics and National Key Laboratory for Laser Technique Huazhong University of Science and Technology Wuhan 430074 China
出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)
年 卷 期：2007年第47卷第5期
页 面：916-920页
核心收录：
学科分类：070207[理学-光学] 07[理学] 08[工学] 0704[理学-天文学] 0803[工学-光学工程] 0702[理学-物理学]
基 金：The project supported in part by National Natural Science Foundation of China unde.r Grant Nos. 10634060 10575040 and 90503010 Acknowledgments The authors would like to thank professor Ying WU for helpful discussion and his encouragement
主 题：two-photon absorption quantum interference closed-loop configuration
摘 要：We theoretically investigate the features of two-photon absorption in a coherently driven four-level atomic system with closed-loop configuration. It is found that two-photon absorption can be completely suppressed just by properly adjusting the relative phase of four coherent low-intensity driving fields and the atomic system becomes trans- parent against two-photon absorption. From a physical point of view, we explicitly explain these results in terms of quantum interference induced by two different two-photon excitation channels.
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