High index of refraction via quantum interference in a three- level system of Er3+-doped yttrium aluminium garnet crystal

• 来源期刊: 中国物理（英文版）
• 关键词: electromagnetically induced transparency high index of refraction with zero absorption Er3+-doped yttrium aluminium garnet crystal
• 年，卷（期）: 2006,（8）
• 页码范围: 1798-1805
• 页数: 8页
• 语种: 英文

摘要

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.