Electronic and optical properties of quantum wells embedded in wrinkled nanomembranes

TL;DR

This paper theoretically explores how wrinkled nanomembranes influence quantum well properties, revealing tunable optical shifts and large bandwidths, which could impact flexible optoelectronic device design.

Contribution

It introduces a theoretical model for quantum wells in wrinkled nanomembranes, showing how wrinkle profiles affect energy shifts and optical properties.

Findings

Wrinkle profiles cause both blue- and redshifts in transition energies.

Energy shifts depend on wrinkle amplitude and period.

Bandwidths up to 70 nm are predicted for asymmetric wrinkled QWs.

Abstract

The authors theoretically investigate quantum confinement and transition energies in quantum wells (QWs) asymmetrically positioned in wrinkled nanomembranes. Calculations reveal that the wrinkle profile induces both blue- and redshifts depending on the lateral position of the QW probed. Relevant radiative transistions include the ground state of the electron (hole) and excited states of the hole (electron). Energy shifts as well as stretchability of the structure are studied as a function of wrinkle amplitude and period. Large tunable bandwidths of up to 70 nm are predicted for highly asymmetric wrinkled QWs.