Engineering directed excitonic energy transfer

TL;DR

This paper presents a method to engineer exciton transfer dynamics in nanostructures by manipulating spectral density, enabling targeted exciton control for quantum and photosynthetic applications, demonstrated through realistic quantum dot models.

Contribution

It introduces a novel approach to control exciton transfer by engineering the spectral density, with practical examples in quantum dot chains.

Findings

Directed exciton transfer can be achieved by spectral density engineering.

Counter-intuitive transfer pathways are possible with specific spectral considerations.

The model's validity is supported by experimentally relevant parameters.

Abstract

We provide an intuitive platform for engineering exciton transfer dynamics. We show that careful consideration of the spectral density, which describes the system-bath interaction, leads to opportunities to engineer the transfer of an exciton. Since excitons in nanostructures are proposed for use in quantum information processing and artificial photosynthetic designs, our approach paves the way for engineering a wide range of desired exciton dynamics. We carefully describe the validity of the model and use experimentally relevant material parameters to show counter-intuitive examples of a directed exciton transfer in a linear chain of quantum dots.