Eur. Phys. J. Plus (2022) 137: 464
https://doi.org/10.1140/epjp/s13360-022-02649-z

Regular Article

Electronic and optical properties of a complex in two-dimensional quantum dots with Gaussian confinement potential

¹ Department of Mathematics and Natural Science Education, Faculty of Education, Sivas Cumhuriyet University, 58140, Sivas, Turkey
² Department of Physics, Faculty of Science, Sivas Cumhuriyet University, 58140, Sivas, Turkey
³ Physics Department, Faculty of Science, Dokuz Eylul University, 35390, Izmir, Turkey
⁴ Dokuz Eylul University, Izmir, Turkey
⁵ Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia

^g carlos.duque1@udea.edu.co

Received: 6 January 2022
Accepted: 24 March 2022
Published online: 13 April 2022

Abstract

Using the two-dimensional diagonalization method and the effective mass approximation, the electronic structure and intersubband optical absorption of the singly ionized double donor complex confined in a Gaussian quantum dot have been investigated. The obtained results indicated that the quantum dot size and internuclear distance significantly affect the binding energy, dissociation energy, equilibrium distance, and amplitude of the optical absorption. Also, we conclude that a significant increase in the amplitude of the dipole-related matrix element and the energy difference between the two lowest-lying energy states is observed when the distance between the donor atoms is in the order of the quantum dot size. Consequently, the electronic and optical properties can be precisely tuned by controlling the system’s size and the internuclear distance.