Dynamic localization versus photon-assisted transport in semiconductor superlattices driven by dc-ac fields

TL;DR

This paper investigates how THz emission signals can be used to probe dynamic localization and multi-photon resonance in semiconductor superlattices driven by dc-ac fields, highlighting the competition between these phenomena.

Contribution

It introduces a numerical analysis method to connect THz emission signals with dynamic localization and photon-assisted transport in superlattices.

Findings

Time-integrated THz signals probe localization and resonance.

Competition between localization and photon-assisted transport is analyzed.

Numerical results support the use of emission signals for characterization.

Abstract

Via the numerical analysis on the intraband dynamics of optically excited semiconductor superlattices, we find that time-integrated squared THz emission signals can be used for probing both dynamic localization and multi-photon resonance in the coherent regime. Competition effect between dynamic localization and photon-assisted transport has also been discussed.