Role of anisotropy in the F\"orster energy transfer from a semiconductor quantum well to an organic crystalline overlayer

TL;DR

This paper investigates how the optical anisotropy of an organic crystalline overlayer influences the non-radiative energy transfer rate from a semiconductor quantum well, showing that orientation can modulate transfer efficiency and energy matching.

Contribution

It provides a detailed analysis of anisotropy effects on Förster energy transfer from a quantum well to an organic layer, highlighting the tunability of transfer rates and energy resonance through crystal orientation.

Findings

Transfer rate can vary by a factor of two with orientation.

Organic crystal orientation affects energy resonance matching.

Anisotropy enables tunable energy transfer in hybrid systems.

Abstract

We consider the non-radiative resonant energy transfer from a two-dimensional Wannier exciton (donor) to a Frenkel exciton of a molecular crystal overlayer (acceptor). We characterize the effect of the optical anisotropy of the organic subsystem on this process. Using realistic values of material parameters, we show that it is possible to change the transfer rate within typically a factor of two depending on the orientation of the crystalline overlayer. The resonant matching of donor and acceptor energies is also partly tunable via the organic crystal orientation.