Control of excitation transfer in coupled quantum dots by a nonresonant laser pulse

TL;DR

This paper presents a theoretical study on controlling exciton transfer between coupled quantum dots using a nonresonant laser pulse, demonstrating efficient transfer via numerical simulations of the Schrödinger equation.

Contribution

It introduces a method to achieve fast and efficient exciton transfer in quantum dots driven by a short nonresonant laser pulse, using numerical solutions of the time-dependent Schrödinger equation.

Findings

Efficient excitation transfer achieved with a picosecond laser pulse.

Numerical simulations confirm control via the optical Stark effect.

Transfer efficiency depends on pulse parameters.

Abstract

We study theoretically fast transfer of excitons between pairs of coupled quantum dots driven by the optical Stark effect that is produced by a short nonresonant laser pulse. The Schr\"odinger equation, in which the relative position of energy levels of quantum dot subsystems is time-dependent, is solved numerically. Computer simulation shows a way to achieve efficient excitation transfer by the action of a picosecond laser pulse with a rectangular envelope function.