High index of refraction via quantum interference in a three-level system of Er^3＋-doped yttrium aluminium garnet crystal  

作　　者：何琼毅 王铁军 高锦岳 

机构地区：[1]CCAST (World Laboratory) Beijing, 100080, China [2]College of Physics, Jilin University, Changchun 130023, China [3]Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy,Educational Ministry of China, Changchun 130023, China

出　　处：《Chinese Physics B》2006年第8期1798-1805,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant No 10334010）.

摘　　要：A simple three-level system is proposed to produce high index of refraction with zero absorption in an Er^3＋-doped yttrium aluminium garnet （YAG） crystal, which is achieved for a probe field between the excited state 4I13/2 and ground state 4I15/2 by adjusting a strong coherent driving field between the upper excited state 4I11/2 and 4I15/2. It is found that the changes of the frequency of the coherent driving field and the concentration of Er^3＋ ions in the YAG crystal can maximize the index of refraction accompanied by vanishing absorption. This result could be useful for the dispersion compensation in fibre communication, laser particle acceleration, high precision magnetometry and so on.A simple three-level system is proposed to produce high index of refraction with zero absorption in an Er^3＋-doped yttrium aluminium garnet （YAG） crystal, which is achieved for a probe field between the excited state 4I13/2 and ground state 4I15/2 by adjusting a strong coherent driving field between the upper excited state 4I11/2 and 4I15/2. It is found that the changes of the frequency of the coherent driving field and the concentration of Er^3＋ ions in the YAG crystal can maximize the index of refraction accompanied by vanishing absorption. This result could be useful for the dispersion compensation in fibre communication, laser particle acceleration, high precision magnetometry and so on.

关 键 词：electromagnetically induced transparency high index of refraction with zero absorption Er^3＋-doped yttrium aluminium garnet crystal 

分 类 号：O436[机械工程—光学工程]