Terahertz emission in ladder plus Y-configurations in double quantum dot structure

被引：28
作者：
Abdullah, M. [1 ,2 ]
Noori, Farah T. Mohammed [2 ]
Al-Khursan, Amin H. [1 ]
机构：
[1] Thi Qar Univ, NNRL, Coll Sci, Nassiriyah, Iraq
[2] Univ Baghdad, Coll Sci, Baghdad, Iraq
来源：
APPLIED OPTICS | 2015年 / 54卷 / 16期
关键词：
2ND-HARMONIC GENERATION; OPTICAL RECTIFICATION; LASERS; GAIN;
D O I：
10.1364/AO.54.005186
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The ladder plus Y-double quantum dot (QD) structure has been proposed to improve the second-order nonlinear susceptibility (SONS) under applied electric field. For this purpose, the wetting layer (WL) and QD inhomogeneity contribution in SONS has been considered. In addition, the structure size effect, energy level separation, momentum matrix elements, and pump detuning have been examined, and show that the SONS is increased by using the WL, a low momentum matrix element of WL-QD transition in comparison with interdot transition while QD inhomogeneity reduces SONS to half. This work is predicted to play a key role in terahertz applications, since the frequency emissions obtained are in the range of 75.5-600 mu m. (C) 2015 Optical Society of America
引用
收藏
页码：5186 / 5192
页数：7
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