MOCVD生长AlGaInN外延层的光学性质研究

对AlInGaN四元合金进行了微区发光和拉曼散射研究.根据V-形缺陷周围扫描电镜图像和阴极荧光光谱的分析,确定AⅡnGaN外延层中V-形缺陷的形成与铟的分凝之间的关系.同时,用波长为325纳米的短波长激光研究了AlInGaN外延薄层的拉曼散射,测量了合金铝组分改变引起的A1(LO)声子的频率移动,观测到了出射共振引起的LO声子拉曼散射谱的共振加强,此共振过程的机制是一种类级联的电子-多声子互作用机制.

与CMOS工艺兼容的硅高速光电探测器模拟与设计

用器件模拟的方法，设计了一种与常规CMOS工艺兼容的硅高速光电探测器，该探测器可与CMOS接收机电路单片集成，对该探测器进行了器件模拟研究，给出了该探测器的电路模型。通过MOSIS（MOS implementation support project）0.35 μm COMS工艺制做了该探测器，实际测试了该器件的频率响应和波长响应，探测器频率响应在1GH以上，峰值波长响应在0.69 μm。

Synthesis and luminescence of CdS/ZnS core/shell nanocrystals

CdS/ZnS core/shell nanocrystals were prepared from an aqueous/alcohol medium. A red shift of the absorption spectrum and an increase of the room temperature photoluminescence intensity accompanied shell growth.

MOVPE growth of GaN and LED on (111) MgAl2O4

The growth of wurtzite GaN by low-pressure metalorganic vapor-phase epitaxy on (1 1 1) magnesium aluminate (MgAl2O4) substrates have been studied. The morphological, crystalline, electrical and optical properties are investigated. A p-n junction GaN LED was fabricated on the MgAl2O4 substrate. (C) 1998 Elsevier Science B.V. All rights reserved.