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红外弱光诱导掺铟铁铌酸锂晶体的光折变效应

Keywords: 掺铟铁铌酸锂晶体,红外弱光,光折变效应,光生伏打效应

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Abstract:

掺铟铁铌酸锂(In:Fe:LiNbO3)晶体在红外弱光辐照下正常折射率变化量△n可以达到10-4数量级.探讨了光生载流子在漂移、扩散和光生伏打效应三种机制下输运迁移以及空间电荷场的形成过程.研究结果表明,光致折射率变化的机制主要是由光生伏打效应引起,并观察到在正常偏振光辐照下,红外弱光与可见光引起晶体的正常折射率变化分布明显不同.

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