Quantum Rings Dressed by a High-Frequency Electromagnetic Field
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We demonstrate theoretically that the interaction of quantum rings with a high-frequency off-resonant electromagnetic field (dressing field) substantially renormalizes their electronic properties. Particularly, it is shown that a linearly polarized dressing field decreases the spin splitting arisen from the Rashba spin-orbit interaction, whereas a circularly polarized field splits electron states corresponding to mutually opposite directions of angular momentum. As a consequence, the dressing field can serve as an effective tool to control spin and transport characteristics of the quantum rings and be potentially exploited in optoelectronic applications.
The work was partially supported by RISE Program (project CoExAN), Russian Foundation for Basic Research (project no. 17-02-00053), Rannis project 163082-051, Ministry of Education and Science of the Russian Federation (projects 3.4573.2017/6.7, 3.2614.2017/4.6, 3.1365.2017/4.6, 3.8884.2017/8.9, 14.Y26.31.0015) and Government of the Russian Federation (grant 08-08).