Experimental observation of the linewidth narrowing of electromagnetically induced transparency resonance  

作　　者：王波 李淑静 姚景芹 马杰 彭枫 蒋刚 王海 

机构地区：[1]The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University [2]Institute of Atomic and Molecular Physics, Sichuan University

出　　处：《Chinese Optics Letters》2005年第8期486-489,共4页中国光学快报（英文版）

基　　金：This work was supported by the National ScienceFoundation of China for Distinguished Young Schol-ars (No. 60325414), the Natural Science Foundation ofShanxi Province (No. 20031007), and Shanxi ReturnedScholar Funds

摘　　要：We report an experimental observation of the variation in linewidth of the electromagnetically induced transparency （EIT） resonance in a three-level A-type system for several laser bandwidths in a Rb vapor cell, with and without a buffer gas. It is found, using narrow bandwidth （about 20 kHz） diode laser for both coupling and probe beams, that the linewidth of the EIT resonance can be significantly narrowed in the Rb vapor cell with the buffer gas. The results are in good qualitative agreement with a simple theoretical calculation.We report an experimental observation of the variation in linewidth of the electromagnetically induced transparency （EIT） resonance in a three-level A-type system for several laser bandwidths in a Rb vapor cell, with and without a buffer gas. It is found, using narrow bandwidth （about 20 kHz） diode laser for both coupling and probe beams, that the linewidth of the EIT resonance can be significantly narrowed in the Rb vapor cell with the buffer gas. The results are in good qualitative agreement with a simple theoretical calculation.

关 键 词：Multiphoton processes Quantum interference phenomena Quantum optics Quantum theory Semiconductor lasers 

分 类 号：O435.1[机械工程—光学工程]