量子点红外探测器的性能优化

Performance Optimization of Quantum Dot Infrared Photodetectors

量子点红外探测器是近年来出现的一种新型低维纳米结构探测器,因其优越的特性引起了人们的广泛关注。本文给出了一种估算量子点红外探测器光电流的方法,并以此为基础,进一步研究了探测器结构对光电流性能的影响。结果显示,当结构参数层内量子点密度和量子点横向尺寸的取值都比较小时,探测器能获得一个高的光电流。

Quantum dot infrared photodetector is a novel lower-dimensional nano-structure detectors appearingin recent years,and it attracts a wide attentions due to its superior properties. In this paper, the method used to estimation of the photocurrent in the quantum dot infrared photodetectors is given, moreover, the influences of the structure on the photocurrent are also discussed based on this method. The results show that the detector can obtain a high photocurrent when the structure parameters such as the quantum dots density in a layer and the lateralsize of the quantum dot are small in the values.