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Shallow-donor impurity effects on the far infrared electron–electron optical absorption coefficient in single and core/shell spherical quantum dots with Konwent-like confinement potential

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Abstract

In this study, the electronic and optical properties of single or core/shell quantum dots, which are formed depending on the parameters in the selected Konwent potential, are investigated. Namely, the effects of the size and geometric shapes of quantum dots on the binding energy of the on-center donor impurity, the total absorption coefficient and refractive index which are including transitions between the some confined states, and the electromagnetically induced transparency between the lowest six confined states related to the donor impurity are investigated. We have used the diagonalization method by choosing a wave function based on the Bessel and Spherical Harmonics orthonormal function to find the eigenvalues and eigenfunctions of the electron confined within the quantum dots which have different types mentioned above. To calculate the optical absorption coefficients and electromagnetically induced transparency related to shallow-donor impurity, a two- and three-level approach in the density matrix expansion is used, respectively.

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Acknowledgements

CAD is grateful to the Colombian Agencies: CODI-Universidad de Antioquia (Estrategia de Sostenibilidad de la Universidad de Antioquia and projects “Propiedades magneto-ópticas y óptica no lineal en superredes de Grafeno”, “Estudio de propiedades ópticas en sistemas semiconductores de dimensiones nanoscópicas”, and “Propiedades de transporte, espintrónicas y térmicas en el sistema molecular ZincPorfirina”), and Facultad de Ciencias Exactas y Naturales-Universidad de Antioquia (CAD exclusive dedication project 2021-2022). CAD also acknowledges the financial support from El Patrimonio Autónomo Fondo Nacional de Financiamiento para la Ciencia, la Tecnología y la Innovación Francisco José de Caldas (project: CD 111580863338, CT FP80740-173-2019)

Funding

The research was supported by El Patrimonio Autónomo Fondo Nacional de Financiamiento para la Ciencia, la Tecnología y la Innovación Francisco José de Caldas (project: CD 111580863338, CT FP80740-173-2019).

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Authors and Affiliations

  1. Physics Department, Faculty of Science, Sivas Cumhuriyet University, 58140, Sivas, Turkey

    E. B. Al & E. Kasapoglu

  2. Department of Mathematical and Natural Science Education, Faculty of Education, Sivas Cumhuriyet University, 58140, Sivas, Turkey

    H. Sari

  3. Dokuz Eylul University (retired), Izmir, Turkey

    I. Sökmen

  4. Grupo de Materia Condensada-UdeA, Facultad de Ciencias Exactas y Naturales, Instituto de Física, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia

    C. A. Duque

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The contributions of the authors are as follows: EBA: was responsible for numerical calculations, figures and writing of the manuscript. EK: proposed the problem and responsible for writing and editing the comments. HS: was responsible for the verification of the solution method. IS: proposed the solution method. CAD: was responsible for writing and editing the comments.

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Al, E.B., Kasapoglu, E., Sari, H. et al. Shallow-donor impurity effects on the far infrared electron–electron optical absorption coefficient in single and core/shell spherical quantum dots with Konwent-like confinement potential. Opt Quant Electron 54, 375 (2022). https://doi.org/10.1007/s11082-022-03758-w

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