Microscopic Analysis on Optical Gain of Terahertz Quantum Cascade Lasers

被引:0
|
作者
Liu, Tao [1 ,2 ]
Lee, Kenneth E. [2 ]
Wang, Qi Jie [1 ,2 ,3 ]
机构
[1] Nanyang Technol Univ, Sch Elect & Elect Engn, 50 Nanyang Ave, Singapore 639798, Singapore
[2] CINTRA CNRS NTU THALES, UMI 3288, Singapore 637553, Singapore
[3] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore
来源
2012 PHOTONICS GLOBAL CONFERENCE (PGC) | 2012年
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中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The effects of many-body coulomb interaction and nonparabolicity on optical gain of terahertz quantum cascade lasers are investigated based on the density-matrix model. The results show that many-body interaction and non-parabolicity effect all red-shift the gain spectrum and reduces the peak value. Furthermore, the interplay of various many-body effects that reveals the optical spectral redshift and reduction are mainly caused by the depolarization terms. The proposed model provides a comprehensive picture of optical properties of THz QCLs, not only enhancing our in-depth understanding of optical gain, but also enabling an accurate prediction of the device performance.
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页数:4
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