Design and analysis of resonant cavity-enhanced quantum ring inter-subband photodetector with resonant tunneling barriers for terahertz detection

作     者：Mahdi Zavvari Mohammad Karimi Kambiz Abedi Mahdi Zavvari;Mohammad Karimi;Kambiz Abedi

作者机构：Department of Electrical EngineeringUrmia BranchIslamic Azad University Department of Electrical EngineeringAhar BranchIslamic Azad University Department of Electrical EngineeringFaculty of Electrical and Computer EngineeringShahid Beheshti University 

出 版 物：《红外与毫米波学报》 (Journal of Infrared and Millimeter Waves)

年 卷 期：2014年第33卷第6期

页      面：571-576页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

主　　题：量子环 理论研究 辐射范围 共振吸收层 

摘      要：The effect of resonant cavity structure on the performance operation of In As/Ga As quantum ring intersubband photodetector is studied for detection of terahertz radiations *** order to confinement of optical field w ithin active region and consequently enhancement in responsivity of device,tw o periods of Al2O3/Ga As distributed bragg reflectors are used as bottom dielectric mirror and a thin layer of Au material as top mirror of *** further improvement in detectivity,Al0.3Ga0.7As/In0.3Ga0.7As resonant tunneling barriers are included in absorption layers to reduce dark current of *** photodetector show s a peak responsivity of about 0.4(A/W)and quantum efficiency of 1.2%at the w avelength of 80μm(3.75 THz).Furthermore,specific detectivity(D*)of device is calculated and results are compared to conventional quantum ring inter-subband *** predict a D*of^1011(***1/2/W)for device at T=80 K and V=0.4 V w hich is tw o orders of magnitude higher than that of conventional QRIPs.