摘要
研究了直流溅射ＺｎＯ薄膜在阴极射线激发下紫外光（约３９０ｎｍ）和绿光（约５２０ｎｍ）的发光与激发电子束电流密度的关系，随激发电流密度增加绿光相对下降，紫外光相对增强，使得ＺｎＯ薄膜的发光颜色从绿变蓝紫．ＺｎＯ薄膜绿光随电子束流密度的增长呈亚线性增长，并在不高的束流密度下达到饱和，而紫外发光随电子束流密度呈超线性增长，这是ＺｎＯ薄膜在室温阴极射线激发下紫外受激发光的迹象．是高密度激发下的一种超辐射受激发光．
The dependence of ultraviolet (～390nm) and green (～520nm) luminescent peaks of ZnO film prepared by direct curren sputtering under cathode ray excitation on excitation electron beam current has been investigated. With the increase of the intensity of excitation electron beam current, green peak relatively decreases and ultraviolet peak relatively increases, so that the luminescent color or ZnO film changes from green to blue violet. The green peak intensity increases sublinearly with the increase of the intensity of electron beam current and saturates under relatively low intensity of electron beam current. But the 390nm ultraviolet peak intensity increases superlinearly with the increase of the intensity of electron beam current. This is a sign of emitting ultraviolet laser from ZnO film under cathode ray excitation under room temperature. This kind of ultraviolet laser from ZnO film may come from a super radiation lasing luminescence under high density excitation.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1998年第3期239-241,共3页
Chinese Journal of Luminescence
基金
国家自然科学基金
关键词
阴极射线发光
紫外激光
受激发光
氧化锌
薄膜
ZnO, cathodoluminescence, ultraviolet laser, super radiation lasing luminescence
