Electron transport of a quantum wire containing a finite-size impurity under terahertz electromagnetic-field illumination

doi:10.1063/1.1939085

IMR OpenIR

	Electron transport of a quantum wire containing a finite-size impurity under terahertz electromagnetic-field illumination
	Zhou, G ; Li, Y ; Cheng, F ; Liao, W
通讯作者	Zhou, G(ghzhou@hunnu.edu.cn)
	2005-06-15
发表期刊	JOURNAL OF APPLIED PHYSICS
ISSN	0021-8979
卷号	97 期号:12 页码:6
摘要	We investigate theoretically the electron-transport properties for a semiconductor quantum wire containing a single finite-size attractive impurity under an external terahertz electromagnetic-field illumination in the ballistic limit. Within the effective-mass free-electron approximation, the scattering matrix for the system has been formulated by means of a time-dependent mode matching method. Some interesting properties of the electron transmission for the system have been shown through numerical examples. It is found that in the case of a relatively large field amplitude and a frequency resonant with that corresponding to the difference between the two lowest lateral energy levels in the impurity region, the field-induced intersubband transition dominates the process as it does in the absence of the impurity. Furthermore, there is a steplike structure on the transmission as a function of the incident electron energy. However, in the case of a small field amplitude and nonresonant frequencies, both multiple symmetry Breit-type resonance peaks and asymmetry Fano-type dip lines appear in the electron transmission dependence on the incident energy due to the presence of the impurity and the external field. Therefore, within a certain energy range the transmission as a function of the field frequency and/or field amplitude shows a rich structure. Moreover, the transmission dependence on the strength and size of the impurity is also discussed. Our results suggest that the electron-transport properties of a quantum wire are affected by the interplay effects between the impurity and the applied field. (c) 2005 American Institute of Physics.
DOI	10.1063/1.1939085
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000230278100040
出版者	AMER INST PHYSICS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/82890
通讯作者	Zhou, G
作者单位	1.CCAST, World Lab, China Ctr Adv Sci & Technol, Beijing 100080, Peoples R China 2.Hunan Normal Univ, Dept Phys, Changsha 410081, Peoples R China 3.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Zhou, G,Li, Y,Cheng, F,et al. Electron transport of a quantum wire containing a finite-size impurity under terahertz electromagnetic-field illumination[J]. JOURNAL OF APPLIED PHYSICS,2005,97(12):6.
APA	Zhou, G,Li, Y,Cheng, F,&Liao, W.(2005).Electron transport of a quantum wire containing a finite-size impurity under terahertz electromagnetic-field illumination.JOURNAL OF APPLIED PHYSICS,97(12),6.
MLA	Zhou, G,et al."Electron transport of a quantum wire containing a finite-size impurity under terahertz electromagnetic-field illumination".JOURNAL OF APPLIED PHYSICS 97.12(2005):6.