超长波GaAs/AlGaAs量子阱红外探测器光电流谱特性研究  

Photocurrent spectra of very long wavelength GaAs/AlGaAs quantum well infrared photodetector

作　　者：袁先漳[1] 陆卫[2] 李宁[2] 陈效双[2] 沈学础[2] 资剑[3] 

机构地区：[1]温州师范学院物理与电子信息科学系,温州325027 [2]中国科学院上海技术物理研究所红外物理国家实验室,上海200083 [3]复旦大学应用表面物理国家重点实验室,上海200433

出　　处：《物理学报》2003年第2期503-507,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展项目 (批准号 :G19980 614 0 4)和国家自然科学基金 (批准号 :10 0 740 68)资助的课题~~

摘　　要：研究了响应波长在 15 μm附近的超长波GaAs AlGaAs量子阱红外探测器在不同外加偏压下的光电流谱特性 .光电流谱上的两个主要由于阱宽随机涨落而呈现为高斯线形的响应峰被分别指认为量子阱基态E0 到第一激发态E1 和第三激发态E3的跃迁 .跃迁峰随着器件上外加偏压的增大而出现线性红移现象 ,认为这种变化起源于激发态与基态对量子阱结构中势变化敏感性的不同 ,采用传输矩阵方法并考虑到电子交互作用修正进行的理论计算在定量上解释了实验结果 .The photocurrent spectra characteristics of the 15 mum very long wavelength GaAs/AlGaAs quantum well infrared photo detector(QWIP) have been investigated. The two photocurrent response peaks, which have a Gaussian lineshape due to the random fluctuation of the well width, are attributed to the transitions from the ground state E-0 to the first excited state E-1 and the third excited state E-3 in the well, respectively. The transition peaks shift linearly to higher energy as the bias across the detector increases. Taking into account electrons exchange effect, we find that the theoretical calculation using the transfer matrix method agrees well with the experimental data.

关 键 词：GAAS/ALGAAS 光电流谱特性 量子阱红外探测器 超长波 传输矩阵 砷化镓 砷镓铝三元化合物 

分 类 号：TN219[电子电信—物理电子学]