Donor-impurity-related optical response and electron Raman scattering in GaAs cone-like quantum dots

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• 作者：A. Gil-Corrales^a ; A.L. Morales^a ; R.L. Restrepo^b ; M.E. Mora-Ramos^c ; C.A. Duque^a ; ^{carlos.duque1@udea.edu.co}
• 关键词：Donor impurity ; Conical quantum dots ; Raman scattering ; Optical properties ; Electronic structure
• 刊名：Physica B: Condensed Matter
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：507
• 期：Complete
• 页码：76-83
• 全文大小：3279 K
• 卷排序：507

文摘

The donor-impurity-related optical absorption, relative refractive index changes, and Raman scattering in GaAs cone-like quantum dots are theoretically investigated. Calculations are performed within the effective mass and parabolic band approximations, using the variational procedure to include the electron-impurity correlation effects. The study involves 1s1s-like, 2px-like, and 2pz-like states. The conical structure is chosen in such a way that the cone height is large enough in comparison with the base radius thus allowing the use a quasi-analytic solution of the uncorrelated Schrödinger-like electron states.