Autoresonant control of the many-electron dynamics in nonparabolic quantum wells

TL;DR

This paper demonstrates that autoresonant laser pulses can efficiently control electron dynamics in nonparabolic quantum wells, enabling current manipulation with minimal pulses through direct Wigner phase-space simulations.

Contribution

It introduces a novel autoresonant control method for many-electron dynamics in nonparabolic quantum wells using chirped laser pulses.

Findings

Few pulses can efficiently detrapped electrons from wells.

Autoresonant pulses enable controlled electronic current in quantum well arrays.

Simulation confirms effectiveness of the method.

Abstract

The optical response of nonparabolic quantum wells is dominated by a strong peak at the plasmon frequency. When the electrons reach the anharmonic regions, resonant absorption becomes inefficient. This limitation is overcome by using a chirped laser pulse in the autoresonant regime. By direct simulations using the Wigner phase-space approach, the authors prove that, with a sequence of just a few pulses, electrons can be efficiently detrapped from a nonparabolic well. For an array of multiple quantum wells, they can create and control an electronic current by suitably applying an autoresonant laser pulse and a slowly varying dc electric field.