Waveguides for Rydberg excitons in Cu$_\text{2}$O from strain traps

TL;DR

This paper explores the creation of waveguides for Rydberg excitons in Cu$_2$O using strain traps, demonstrating potential depths in the meV range and GHz trap frequencies, with minimal impact on excitonic binding energies.

Contribution

It introduces strain-based waveguides for Rydberg excitons, offering an alternative to optical traps with high potential depths and frequencies.

Findings

Potential depths reach meV levels

Trap frequencies in the GHz regime

Band gap shifts suffice for trapping, excitonic binding energies remain stable

Abstract

We investigate the formation of waveguides for Rydberg excitons in Cu$_\text{2}$O from cylindrical stressors as alternatives to optical traps. We show that the achievable potential depths can easily reach the meV and the trap frequencies the GHz regimes. For Rydberg excitons, we find that it is sufficient to consider only the shift of the band gap, whereas the excitonic binding energies remain almost unchanged.