Terahertz emission in quantum dots by sum frequency generation

被引：1
|
作者：
Abdullah, M. [1 ,2 ]
Noori, Farah T. Mohammed [2 ]
Al-Khursan, Amin H. [1 ]
机构：
[1] Thi Qar Univ, Coll Sci, Nassiriya Nanotechnol Res Lab, Nassiriya, Iraq
[2] Univ Baghdad, Coll Sci, Baghdad, Iraq
来源：
CURRENT APPLIED PHYSICS | 2016年 / 16卷 / 07期
关键词：
Quantum dot; Second-order nonlinear susceptibility; Valence intersubband; NANOSTRUCTURE; LASERS; WELLS; GAIN;
D O I：
10.1016/j.cap.2016.04.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The second-order nonlinear susceptibility (SONS) in self-assembled InAs quantum dots (QDs), in the form of quantum disks, under applied electric field was studied. Using Feynman diagram, the relation of SONS for sum frequency generation was stated. Two cases were studied, which are the interband (IB) and intersubband (ISB) transitions with the consideration of the QD inhomogeneity, which is shown to be important in SONS calculations. For the ISB case, a resonance near 92 mm was predicted, which is important for infrared applications. Energy subbands and momentum matrix elements are shown as the main factors controlling SONS. It was found that adding some detuning to the pump will extend the wavelength by 45 mm which might applicable for Terahertz (THz) applications. Double resonance was shown to blue shifts the wavelength. (C) 2016 Elsevier B.V. All rights reserved.
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页码：763 / 771
页数：9
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