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题名: Polarization dependence of absorption in strongly vertically coupled InAs/GaAs quantum dots for two-color far-infrared photodetector
作者: Wang ZC;  Chen YH;  Xu B;  Liu FQ;  Shi LW;  Tang CG;  Wang ZG
发表日期: 2008
摘要: Strongly vertically coupled InAs/GaAs quantum dots (QDs) with modulation doping are investigated, and polarization dependence of two-color absorptions was observed. Analysis of photoluminescence (PL) and absorption spectra shows that s-polarized absorptions at. 10.0 and 13.4 mu m, stem from the first excited state E-1 and the second excited state E-2 in the QDs to the bound state E-InGaAs in the InGaAs spacer, respectively, whereas p-polarized absorptions at 10.0 and 8.2 mu m stem from the first excited state E-1 and the ground E-g in the QDs to the bound state E-InGaAs in the InGaAs spacer, respectively. These measurements illustrate that transitions from excited states are more sensitive to normal incidence, which are very important in designing QD infrared detector. (C) 2007 Elsevier B.V. All rights reserved.
KOS主题词: Quantum dot
刊名: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Wang, ZC ; Chen, YH ; Xu, B ; Liu, FQ ; Shi, LW ; Tang, CG ; Wang, ZG .Polarization dependence of absorption in strongly vertically coupled InAs/GaAs quantum dots for two-color far-infrared photodetector ,PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,2008 ,40(3): 633-636
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