中国物理B ›› 2008, Vol. 17 ›› Issue (8): 2885-2889.doi: 10.1088/1674-1056/17/8/022
李院院1, 白晋涛1, 闫军锋1, 侯 洵2, 甘琛利3, 张彦鹏3
Li Yuan-Yuan(李院院)a)†, Hou Xun(侯洵)a)b), Bai Jin-Tao(白晋涛)a), Yan Jun-Feng(闫军锋)a), Gan Chen-Li(甘琛利)c), and Zhang Yan-Peng(张彦鹏)c)
摘要: This paper investigates the absorptive reduction and the width narrowing of electromagnetically induced transparency (EIT) in a thin vapour film of $\Lambda $-type atoms confined between two dielectric walls whose thickness is comparable with the wavelength of the probe field. The absorptive lines of the weak probe field exhibit strong reductions and very narrow EIT dips, which mainly results from the velocity slow-down effects and transient behaviour of atoms in a confined system. It is also shown that the lines are modified by the strength of the coupling field and the ratio of $L / \lambda$, with $L$ the film thickness and $\lambda $ the wavelength of the probe field. A simple robust recipe for EIT in a thin medium is achievable in experiment.
中图分类号: (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)