High index of refraction via quantum interference in a three-level system of Er3+-doped yttrium aluminium garnet crystal
He Qiong-Yi(何琼毅)b) c), Wang Tie-Jun (王铁军)b) c), and Gao Jin-Yue(高锦岳)a)b)c) †
a CCAST (World Laboratory) Beijing, 100080, Chinab College of Physics, Jilin University, Changchun 130023, Chinac Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Educational Ministry of China, Changchun 130023, China
Abstract A simple three-level system is proposed to produce high index of refraction with zero absorption in an Er3+-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 Er3+ 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.
Received: 22 November 2005
Revised: 29 April 2006
Accepted manuscript online:
PACS:
42.50.Gy
(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
(Edge and boundary effects; reflection and refraction)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10334010).
Cite this article:
He Qiong-Yi(何琼毅), Wang Tie-Jun (王铁军), and Gao Jin-Yue(高锦岳) High index of refraction via quantum interference in a three-level system of Er3+-doped yttrium aluminium garnet crystal 2006 Chinese Physics 15 1798
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