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. 2020 Jun 8;10:9155. doi: 10.1038/s41598-020-65862-9

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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On-center donor impurity related optical absorption coefficient in a cylindrical GaAs-Al_0.3 Ga_0.7 As quantum dot as a function of the incident photon energy, and the applied magnetic field, with θ = α = π/2 (a–c) and θ = α = 0 (d–f). The results are for F = 50 kV/cm, R = 20 nm, and H = 20 nm. The vertical red bar at the top indicates the magnitude of the optical absorption coefficient. The polarizations of the incident photon are as follows: left hand circular polarized radiation (a,d), right hand circular polarized radiation (b,e), and z-linear polarized radiation (c,f). In all panels, the symbols 0 → n, with n = 1, 2, 3, … (where 0 corresponds to the initial ground state and n is for the final excited one), indicate the allowed optical transitions at B = 0 (at the bottom of each panel) and B = 30 T (at the top of each panel).