镶嵌在SiO_2薄膜中的锗纳米晶粒的光致发光

Visible Photoluminescence of Ge Nanocrystallites Embedded in SiO 2 Thin Film

采用６３０ｎｍ波长的激发光在室温下对镶嵌有锗纳米晶的ＳｉＯ２薄膜进行了光致发光研究。在室温下观察到了由于双光子吸收而导致的蓝色荧光峰。按照量子限域理论对所观察到的峰的特征进行了讨论。

A SiO 2 thin film embedded with Ge nanocrystallites was selected for the photoluminescence measurement at room temperature(RT) with exciting beam of 630nm. Visible peaks in blue region, which were caused by two photon absorption, were clearly observed at RT. The feature of the peaks was discussed according to quantum confinement effect.