Impurity-related optical response in cylindrical quantum dots with a δ-doped axial potential under an intense laser field. (September 2018)

• Record Type: Journal Article
• Authors: Sari, H.; Ungan, F.; Sakiroglu, S.; Yesilgul, U.; Sökmen, I.
• Is Part Of: Journal of physics and chemistry of solids. Volume 120(2018)
• Page Start: 279
• Page End: 286
• Publication Date: 2018-09
• Subjects: δ-Doped quantum dot -- Nonlinear optical properties -- Intense laser field; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2018.04.038
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: A theoretical study of the effects of a nonresonant intense laser field on the absorption coefficients and refractive index changes for a two-level system associated with transitions from the 1 S -like impurity state to the 2 P z -like impurity state in a cylindrical quantum dot with a δ -doped axial potential is performed in the framework of the effective mass approximation. It is found that the nonresonant intense laser field and axial impurity position have obvious effects on the transition matrix elements and also on the difference between the electron densities of the states in cylindrical quantum dots, which are related to the refractive index changes and optical absorption coefficients. Highlights: Investigation of the effects of a nonresonant intense laser field and the impurity position on optical response in quantum dots. The laser field has an obvious effect on the transition matrix elements and electron densities of the states in cylindrical quantum dots. The hydrogenic impurity states can be adjusted in accordance with the purpose by the presence of the laser field.