Polarized light bursts from kicked quantum rings
A.S. Moskalenko, J. Berakdar
TL;DR
This paper presents a theoretical study of how driven quantum rings emit controllable circularly polarized subterahertz radiation, with polarization degrees adjustable on extremely short time scales, considering radiative and non-radiative effects.
Contribution
The authors develop a new theory for time-dependent detection of circular polarization in polychromatic radiation emitted by quantum rings, accounting for various emission processes.
Findings
Quantum rings emit circular polarized subterahertz radiation.
Polarization can be controlled on nano- to picosecond time scales.
The theory accurately models the influence of radiative and non-radiative processes.
Abstract
Non-equilibrium quantum rings emit circular polarized subterahertz radiation with a polarization degree controllable on nano- to picosecond time scales. This we conclude using a theory developed here for the time-dependent detection of the circular polarization of polychromatic radiations, valid for time scales comparable to the reciprocal of characteristic emission frequencies. The theory is applied to driven quantum rings whereby the influence of radiative and non-radiative processes on the properties of the emitted light is incorporated.
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