Interference between electromagnetically induced transparency and two-step excitation in three-level ladder systems
Interference between electromagnetically induced transparency and two-step excitation in three-level ladder systems
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DOI：
10.1364/josab.27.001645
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发表时间：
2010-08-01
影响因子：
1.9
通讯作者：
Mitsunaga, Masaharu
中科院分区：
文献类型：
--
作者：
Hayashi, Nobuhito;Fujisawa, Akihiko;Mitsunaga, Masaharu
We have performed electromagnetically induced transparency (EIT) and two-photon absorption experiments in ladder-type three-level systems in a hot sodium atomic vapor, using the 3S(1/2)-3P(1/2)-4D(3/2), 3S(1/2)-3P(3/2)-4D(3/2,5/2), 3S(1/2)-3P(1/2)-5S(1/2), and 3S(1/2)-3P(3/2)-5S(1/2) transitions. In particular, in the most pronounced 3S(1/2)-3P(1/2)-4D(3/2) system, we have observed quite unique spectral line shapes that are superpositions of sharp dips and peaks, in contrast to ordinary EIT spectra. The peaks and dips have apparently different physical origins, and the line shape can be interpreted as the interference between EIT and two-step excitation. (C) 2010 Optical Society of America
