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

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.