Abstract
We investigate the controlled bistable dynamics in a four-mirror optomechanical cavity with two transversely located macroscopic movable mirrors. A strong external pump laser longitudinally drives the cavity, building up a strong cavity mode which interacts with the movable mirrors after getting split from beam splitter . Two mechanical drives externally interact with each of the movable mirrors perturbing their oscillatory motion. We show that the bistable behavior of intra-cavity steady-state photon number, occurring because of the cavity–mirrors coupling, gets significantly enhanced with presence of external mechanical drives. These enhancements can be controlled with the strength of mechanical drive, providing an opportunity to perform optical switching at higher photon number states. Further, we illustrate that the bistable dynamics of movable mirrors are not only being controlled with external mechanical drives, but the increase in mechanical drive of one mirror also suppresses the bistability of other movable mirror with constant (or zero) mechanical drive. We also show the impacts of external mechanical drives on the effective potential of the system. • Optomechanics of four-mirror cavity. • Controlled and enhanced optical bistability in a four-mirror cavity-optomechanics. • Dynamical effects of external mechanical drive on cavity-optomechanics. • Suppression of spatial bistability with external mechanical drive.
Published Version
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