Optically controlled periodical chain of quantum rings

TL;DR

This paper theoretically shows that circularly polarized light can control electronic properties in a chain of quantum rings, enabling optically tunable nanodevices by modifying energy spectra and electron transport.

Contribution

It introduces a theoretical framework demonstrating how electromagnetic fields can manipulate quantum ring chains for optoelectronic applications.

Findings

Field opens band gaps in electron spectrum

Generation of edge electron currents

Induction of Fano-like features in transport

Abstract

We demonstrated theoretically that a circularly polarized electromagnetic field substantially modifies electronic properties of a periodical chain of quantum rings. Particularly, the field opens band gaps in the electron energy spectrum of the chain, generates edge electron currents and induces the Fano-like features in the electron transport through the finite chain. These effects create physical prerequisites for the development of optically controlled nanodevices based on a set of coupled quantum rings.