Interminiband absorption in a quantum ring superlattice in magnetic field with periodic vector potential

TL;DR

This paper theoretically investigates how magnetic fields and superlattice symmetry influence the electronic and optical properties of quantum ring superlattices, revealing tunable energy gaps and absorption characteristics.

Contribution

It introduces a theoretical analysis of interminiband absorption and Aharonov-Bohm oscillations in quantum ring superlattices with periodic vector potential, highlighting control mechanisms.

Findings

Energy gaps between minibands can be tuned by magnetic field.

Absorption coefficient depends on superlattice symmetry and light polarization.

Energy crossings and anticrossings are observed in the miniband structure.

Abstract

The miniband Aharonov-Bohm oscillations and the interminiband absorption coefficient have been considered theoretically for one-layer superlattices of square and rectangular symmetries, composed of cylindrical quantum rings in the external transverse magnetic field with a periodic vector potential by the lattice constants. The crossings and anticrossings of the energies corresponding to different values of quasimomentum are observed. It is shown that the energy gap between the minibands and the sequence of the energies in each miniband can be tuned by the magnetic field. The interminiband absorption coefficient qualitatively depends on the symmetry of the superlattice, magnetic field induction and the incident light polarization. The obtained results indicate on the possibility to control the electronic and optical characteristics of the devices based on quantum ring superlattices.