降低平面结型碲镉汞焦平面阵列光串音的结构优化研究  

STUDY ON STRUCTURAL OPTIMIZATION OF DECREASING THE CROSSTALK OF PLANNAR HgCdTe FOCAL PLANE ARRAYS

作　　者：全知觉[1] 叶振华[1] 胡伟达[1] 李志锋[1] 陆卫[1] 

机构地区：[1]中国科学院上海技术物理研究所红外物理国家重点实验室,上海200083

出　　处：《红外与毫米波学报》2006年第5期329-332,337,共5页Journal of Infrared and Millimeter Waves

基　　金：国家重点基础研究专项基金(2004CB619004;2001CB309302);国家自然科学基金(60476031;10234040;60244002)

摘　　要：研究了一种能够降低平面结型碲镉汞(HgCdTe,MCT)焦平面阵列光串音的新型结构.该结构通过对平面结型MCT焦平面阵列的衬底几何形状的优化设计,来达到增大光响应率、减少光串音的目的,以期提高器件的性能.提出了结构优化的快速近似设计方法,并利用商用器件模拟软件对Hg0.78Cd0.22Te器件进行了二维模拟.计算结果显示:当少子寿命为10 ns时,经过优化设计后的器件,光响应率增加了9.6%,光串音从未优化前的5.23%减小到1.05%.A new structure that can decrease the crosstalk of planar HgCdTe （MCT） Focal Plane Arrays （FPA） was investigated theoretically. In order to improve the property of FPA, the geometry of the FPA＇s substrate was designed to increase the spectral response and to decrease the crosstalk. The method of structural optimization was established. The two - dimensional simulation of Hg0.78Cdo.22Te devices was performed by using a device simulator. The results of calculation indicate that the spectral response increases 9.6%, and that the crosstalk decreases down to 1.05% from 5.23% when minority carrier lifetime is 10ns.

关 键 词：碲镉汞(MCT) 焦平面阵列 光串音 器件模拟 

分 类 号：TB4[一般工业技术]