对嵌埋于玻璃基体中的(dS0.1 Se0.9纳米晶体进行了室温电调制透射谱测量,观察到较强的共振和非共振电光响应信号(10-4～10-3).共振电光响应具有如下特征:同一组分的纳米晶体其信号的峰位随着尺寸减小向高能方向移动;同一样品谱线形状不随外电场强度而变;信号幅度与外电场强度的平方成线性关系,并且随调制频率的增加而减小;共振电光效应的物理机制是量子受限的Stark效应.非共振电光响应信号呈与波长有关的振荡线形;外电场强度增加,非共振电光响应信号幅度也增加;用介电受限的局域场增强理论解释了非共振电光效应的物理机制.
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