A polariton condensate in a wedged microcavity stripe cascades down engineered energy levels and drives coherent multifrequency phonon emission at 20, 60, and 100 GHz.
The solid thin (black) line in (a) shows the corre- sponding amplitudes for the case of a larger initial amplitude of the phonon
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Polariton cascade phonon laser
A polariton condensate in a wedged microcavity stripe cascades down engineered energy levels and drives coherent multifrequency phonon emission at 20, 60, and 100 GHz.