Polariton resonances for ultra-strong coupling cavity optomechanics in GaAs/AlAs multiple quantum wells
B.Jusserand, A. Poddubny, A. Poshakinskiy, A. Fainstein, and A., Lemaitre
TL;DR
This paper demonstrates enhanced polariton-mediated light-sound interactions in GaAs/AlAs quantum wells, enabling ultrastrong optomechanical coupling with potential for highly sensitive displacement detection.
Contribution
It reports a significant photoelastic coupling enhancement at exciton-polariton resonance, paving the way for ultrastrong cavity optomechanics in GaAs-based nanodevices.
Findings
Photoelastic coupling enhancement reaches 105 at 30 K
Potential for optomechanical couplings g0 in the range of 100 THz
Enables ultrastrong coupling phenomena in cavity optomechanics
Abstract
Polariton-mediated light-sound interaction is investigated through resonant Brillouin experiments in GaAs/AlAs multiple-quantum wells. Photoelastic coupling enhancement at exciton-polariton resonance reaches 105 at 30 K as compared to a typical bulk solid room temperature transparency value. When applied to GaAs based cavity optomechanical nanodevices, this result opens the path to huge displacement sensitivities and to novel ultrastrong-coupling cavity phenomena with optomechanical couplings g0 in the range of 100 THz.
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