Realization of exciton-mediated optical spin-orbit interaction in organic microcrystalline resonators

TL;DR

This paper demonstrates controllable, wavelength-dependent Rashba-Dresselhaus spin-orbit interaction in organic microcrystalline resonators, enabling new possibilities for spin-controlled nanophotonics and integrated photonic devices.

Contribution

It introduces a novel method to engineer spin-orbit interaction in organic microcavities through anisotropic excitonic responses, advancing spin-photonics technology.

Findings

Achieved wavelength-dependent Rashba-Dresselhaus spin-orbit interaction.

Demonstrated transition from photonic to excitonic spin-orbit dominance.

Enabled control over light's spin-orbit coupling in organic microresonators.

Abstract

The ability to control the spin-orbit interaction of light in optical microresonators is of fundamental importance for future photonics. Organic microcrystals, due to their giant optical anisotropy, play a crucial role in spin-optics and topological photonics. Here we realize controllable and wavelength-dependent Rashba-Dresselhaus spin-orbit interaction, attributed to the anisotropic excitonic response in an optical microcavity filled with an organic microcrystalline. We also investigate the transition of the spin-orbit interaction from dominant photonic type caused by the splitting of the transverse-electric and transverse-magnetic modes to spin-orbit interaction of the Rashba-Dresselhaus type. The interplay of the two allows us to engineer the spin-orbit interaction of light in organic microcavities, which besides its fundamental interest promises applications in spin-controlled on-chip integrated nanophotonic elements, towards exploiting non-magnetic and low-cost spin-photonic devices.