Optical control of exciton and spin states in a quantum dot by excitation with twisted light

19th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures

Kuhn, T.^1 ; Reiter, D.E.^1,2 ; Quinteiro, G.F.^3

Institut für Festkörpertheorie, Universität Münster, Münster

48149, Germany^1

Imperial College London, South Kensington Campus, London

SW7 2AZ, United Kingdom^2

Departamento de Fisica and IFIBA, Universidad de Buenos Aires, Buenos Aires, Argentina^3

关键词: Light-matter coupling;    Optical control;    Special properties;    Spin state;    Twisted light beams;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/647/1/012012/pdf
DOI  :  10.1088/1742-6596/647/1/012012

来源: IOP

【 摘 要 】

We discuss how the excitation of a quantum dot can benefit from the special properties of twisted light beams. First we address the question of the appropriate theoretical description of the light-matter coupling in this system, i.e., of the most appropriate gauge. Then we discuss the optical transitions induced by different types of twisted light beams showing that both the envelope and the spin state of the exciton can be well controlled.