Electric dipole moment oscillations in Aharonov-Bohm quantum rings

TL;DR

This paper predicts and analyzes magneto-oscillations of the electric dipole moment in Aharonov-Bohm quantum rings, revealing control over optical transition rules and terahertz radiation polarization.

Contribution

It introduces the concept of electric dipole moment oscillations in Aharonov-Bohm rings and explores their implications for optical control and terahertz emission.

Findings

Electric dipole moments oscillate with magnetic flux.

Oscillations enable control of optical transition selection rules.

Potential for tunable terahertz radiation polarization.

Abstract

Magneto-oscillations of the electric dipole moment are predicted and analyzed for a single-electron nanoscale ring pierced by a magnetic flux (an Aharonov-Bohm ring) and subjected to an electric field in the ring's plane. These oscillations are accompanied by periodic changes in the selection rules for inter-level optical transitions in the ring allowing control of polarization properties of the associated terahertz radiation.