Many-body effects on terahertz quantum well detectors

被引：56
|
作者：
Guo, X. G. [1 ]
Tan, Z. Y. [1 ]
Cao, J. C. [1 ]
Liu, H. C. [2 ]
机构：
[1] Chinese Acad Sci, State Key Lab Funct Mat Informat, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
[2] CNR, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 20期
基金：
中国国家自然科学基金;
关键词：
density functional theory; quantum well devices; terahertz wave detectors; INTERSUBBAND ABSORPTION; PHOTODETECTORS; DEPOLARIZATION; PHOTOCURRENTS; TECHNOLOGY;
D O I：
10.1063/1.3134485
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Many-body effects have been investigated in the design of terahertz quantum well photon detectors. A large discrepancy between the theoretical and experimental photoresponse peak positions exist without considering the many-body interactions. The calculated results agree with the experimental data quantitatively with including the exchange-correlation and depolarization effects within the local density approximation. Our numerical results show that it is a must to consider the many-body interactions for designing the quantum well detectors for the terahertz region.
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页数：3
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