Condition for Doppler-free three-photon resonance in a ladder-type atomic system

被引：5
|
作者：
Lee, Yoon-Seok [1 ]
Moon, Han Seb [1 ]
机构：
[1] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea
来源：
OPTICS EXPRESS | 2015年 / 23卷 / 24期
基金：
新加坡国家研究基金会;
关键词：
ELECTROMAGNETICALLY INDUCED TRANSPARENCY; INDUCED ABSORPTION; EXCITATION;
D O I：
10.1364/OE.23.031574
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the essential condition for three-photon electromagnetically induced absorption (TPEIA) in a Doppler-broadened ladder-type atomic system. When the two coupling lasers operate at different frequencies, we observed Doppler-free TPEIA resonance at a counterintuitive frequency, which is the almost half-frequency detuning of the frequency difference between the two coupling fields. Considering three-photon coherence in a Doppler-broadened ladder-type three-level atomic system, the TPEIA due to the atomic group of non-zero velocity was in good agreement with the calculated TPEIA spectrum under the one-photon resonance condition of all three optical fields. From the results, we found that an atomic group with a proper velocity for ladder-type TPEIA should satisfy the one-photon resonances of all three optical fields. (C) 2015 Optical Society of America
引用
收藏
页码：31574 / 31581
页数：8
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