Exceptional Points in Random-Defect Phonon Lasers
Exceptional Points in Random-Defect Phonon Lasers
Intrinsic defects in optomechanical devices are generally viewed to be detrimental for achieving coherent amplification of phonons, and great care has thus been exercised in fabricating devices and materials with no (or a minimal number of) defects. Contrary to this view, here we show that, by surpassing an exceptional point …