All-optical control of excitons in semiconductor quantum wells

TL;DR

This paper presents a method using Floquet theory to control excitonic properties in semiconductor quantum wells with high-frequency electromagnetic fields, enabling tunable optical characteristics for optoelectronic applications.

Contribution

The authors develop a novel Floquet-based approach to manipulate excitonic properties in quantum wells using high-frequency fields, demonstrating control over emission spectra.

Findings

Induced blue shift of exciton emission

Narrowing of spectral line width

Modification of optical properties for device tuning

Abstract

Applying the Floquet theory, we developed the method to control excitonic properties of semiconductor quantum wells by a high-frequency electromagnetic field. It is demonstrated, particularly, that the field induces the blue shift of exciton emission from the quantum wells and narrows width of the corresponding spectral line. As a consequence, the field strongly modifies optical properties of the quantum wells and, therefore, can be used to tune characteristics of the optoelectronic devices based on them.