Self-stabilization of high frequency oscillations in semiconductor superlattices by time-delay autosynchronization

TL;DR

This paper introduces a new control scheme using time-delayed feedback to stabilize high-frequency oscillations in semiconductor superlattices, aiming to suppress chaotic behavior in their spatio-temporal dynamics.

Contribution

It proposes a practical, global feedback control method based on chaos theory to stabilize oscillations in superlattices, simplifying implementation.

Findings

Effective suppression of chaos in superlattice oscillations

Control scheme relies on global electrical variables

Potential for easy practical application

Abstract

We present a novel scheme to stabilize high-frequency domain oscillations in semiconductor superlattices by a time-delayed feedback loop. Applying concepts from chaos control theory we propose to control the spatio-temporal dynamics of fronts of accumulation and depletion layers which are generated at the emitter and may collide and annihilate during their transit, and thereby suppress chaos. The proposed method only requires the feedback of internal global electrical variables, viz current and voltage, which makes the practical implementation very easy.