面向弱光探测的短波红外异质结光电晶体管器件仿真设计
Simulation design of short-wave infrared heterogeneous phototransistor for weak light detection
摘要
Abstract
The sensitivity of the detector is the core technical indicator of the infrared detector.Short-wave infrared de-tector has low dark current and the detection sensitivity will be limited by the inherent read-out circuit noise of the detec-tion system.Therefore,it is an effective way to further enhance the detection sensitivity by introducing internal gain in-to the detector.The heterogeneous phototransistor has advantages of high gain,low operating bias,and low excess noise,which provides a novel approach for high-sensitive detection.This paper mainly focuses on the simulation design of InGaAs/GaAsSb type-Ⅱ superlattice short-wave infrared phototransistor,and studies the dependence of the device size and structure on the optoelectronic characteristics.The results show that a higher gain,a lower dark current,and a faster response can be achieved by a smaller base-area size.Based on the optimization design of the device size and structure,a noise equivalent photon lower than 10 can be achieved,which provides a new technical approach to achieve high-sensitive heterogeneous phototransistor detector.关键词
短波红外/光电晶体管/高增益/噪声等效光子数Key words
short-wave infrared/phototransistor/high gain/noise equivalent photon(NEPh)分类
信息技术与安全科学引用本文复制引用
廖科才,黄敏,王楠,梁钊铭,周易,陈建新..面向弱光探测的短波红外异质结光电晶体管器件仿真设计[J].红外与毫米波学报,2025,44(2):144-152,9.基金项目
国家自然科学基金(62335017,62222412,62104236,62104237) （62335017,62222412,62104236,62104237）
国家重点研发计划(2022YFB3404405) （2022YFB3404405）
中国科学院青年创新促进会基金(Y202057) （Y202057）
上海市扬帆计划(21YF1455000,22YF1455800) （21YF1455000,22YF1455800）
上海市自然科学基金(23ZR1473500,23ZR1473100) （23ZR1473500,23ZR1473100）
上海市超级博士后计划(2021418) （2021418）
中国科学院上海技术物理研究所创新专项基金(CX-513,CX-512,CX-508,CX-455,CX-399)Supported by the National Natural Science Foundation of China(NSFC)(62335017,62222412,62104236,62104237),the Na-tional Key Research and Development Program of China(2022YFB3404405),the Youth Innovation Promotion Association Foundation of CAS(Y202057),the Shanghai Sailing Program(21YF1455000,22YF1455800),the Natural Science Foundation of Shanghai(23ZR1473500,23ZR1473100),the Shanghai Post-doctoral Excellence Program(2021418),the Special Fund for Innovation of SITP,CAS(CX-513,CX-512,CX-508,CX-455,CX-399) （CX-513,CX-512,CX-508,CX-455,CX-399）
