Intersubband absorption energy shifts in 3-level system for asymmetric quantum well terahertz emitters
文献类型：期刊论文
| 作者 | Song, Yafeng1; Lu, Yanwu2; Zhang, Biao1; Xu, Xiaoqing1; Wang, Jun1; Guo, Yan1; Shi, Kai1; Li, Zhiwei1; Liu, Xianglin1; Yang, Shaoyan1 |
| 刊名 | Journal of applied physics
 |
| 出版日期 | 2010-10-15 |
| 卷号 | 108期号:8页码:10 |
| ISSN号 | 0021-8979 |
| DOI | 10.1063/1.3487953 |
| 通讯作者 | Song, yafeng(songyafeng@semi.ac.cn) |
| 英文摘要 | Intersubband absorption energy shifts in 3-level system stemming from depolarization and excitonlike effects are investigated. analytically, the expressions we derive present good explanations to the conventional 2-level results and bare potential transition energy results; and numerical results show that they are more exact than the previous studies to describe the 3-level system depolarization and excitonlike shift (des) character especially for higher carrier density (more than 8 x 10(11) cm(-2)). one interesting detail we find is that the "large blue" des becomes "slight redshift" in the low doping limit (less than 1.9 x 10(11) cm(-2)), which may be neglected by the previous studies of intersubband transitions. temperature character of des in the step well structure is also numerically studied. finally the above are applied to calculate asymmetric step quantum well structures. the two main functional aspects of terahertz (thz) emitters are discussed and several basic optimizing conditions are considered. by adjusting the well geometry parameters and material composition systematically, some optimized structures which satisfy all of the six conditions are recommended in tables. these optimizations may provide useful references to the design of 3-level-based optically pumping thz emitters. (c) 2010 american institute of physics. [doi: 10.1063/1.3487953] |
| WOS关键词 | OPTICAL PHONON ENERGY ; INVERSION-LAYERS ; TRANSITIONS ; RELAXATION ; LASERS ; STATES |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Applied |
| 语种 | 英语 |
| WOS记录号 | WOS:000283745100013 |
| 出版者 | AMER INST PHYSICS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2428028 |
| 专题 | 半导体研究所 |
| 通讯作者 | Song, Yafeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China 2.Beijing Jiaotong Univ, Dept Phys, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Yafeng,Lu, Yanwu,Zhang, Biao,et al. Intersubband absorption energy shifts in 3-level system for asymmetric quantum well terahertz emitters[J]. Journal of applied physics,2010,108(8):10. |
| APA | Song, Yafeng.,Lu, Yanwu.,Zhang, Biao.,Xu, Xiaoqing.,Wang, Jun.,...&Wang, Zhanguo.(2010).Intersubband absorption energy shifts in 3-level system for asymmetric quantum well terahertz emitters.Journal of applied physics,108(8),10. |
| MLA | Song, Yafeng,et al."Intersubband absorption energy shifts in 3-level system for asymmetric quantum well terahertz emitters".Journal of applied physics 108.8(2010):10. |
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来源：半导体研究所
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