Optical directional amplification in a three-mode optomechanical system

Abstract

We study the directional amplification of an optical probe field in a three-mode optomechanical system, where the mechanical resonator interacts with two linearly-coupled optical cavities and the cavities are driven by strong optical pump fields. The optical probe field is injected into one of the cavity modes, and at the same time, the mechanical resonator is subject to a mechanical drive with the driving frequency equal to the frequency difference between the optical probe and pump fields. We show that the transmission of the probe field can be amplified in one direction and deamplified in the opposite direction. This directional amplification or de-amplification results from the constructive or destruction interference between different transmission paths in this three-mode optomechanical system.

Nonreciprocity via Nonlinearity and Synthetic Magnetism

“…Moreover, a circulator with nonreciprocal photon blockade was designed based on the combination of nonlinearity and synthetic magnetism in a symmetric nonlinear cyclic three-mode system. The nonreciprocity based on the combination of nonlinearity and synthetic magnetism can also be used for other applications, such as nonreciprocal photon turnstiles [46], nonreciprocal photon routers [47][48][49], and directional amplifiers [50][51][52][53][54].…”

Selective and switchable optical amplification with mechanical driven oscillators

“…The transitions |m, n 1 , n 2 ↔ |m + 1, n 1 , n 2 , |m, n 1 + 1, n 2 ↔ |m + 1, n 1 , n 2 , and |m, n 1 , n 2 ↔ |m, n 1 + 1, n 2 can be achieved by applying a probe field, an optical pump field, and a mechanical pump field. Clearly, the three couplings result in a closedloop ∆-type transition strcture, leading to the phasesensitive optical behaviors of the OMIT system [78][79][80]. As shown in Fig.…”

“…Here we find that, by selectively driving the mechanical resonators, the OMIT peaks and the accompanied optical group delays can be significantly altered. In comparison with the case of only a single driven oscillator [78][79][80][81][82][83][84], in our system, we can achieve symmetric or asymmetric suppressions or amplifications of double OMIT peaks, which is accompanied by either significantly enhanced advance or a transition from advance to delay of the signal light. Our results confirm that multi-mode OMIT devices with selective acoustic control, provide a versatile route to realize coherent multiband modulations, switchable signal amplifications, and COM based light communications.…”

Realization of Directional Amplification in a Microwave Optomechanical Device

“…Based on a slightly different mechanism where counterpropagating optical modes in micro-spheres, -rings or -toroids face different optomechanically-induced transparencies or amplifications, optomechanically-induced * laure.mercierdelepinay@aalto.fi nonreciprocity [17] led to a variety of realizations of isolators, circulators and directional amplifiers in the optical domain [18][19][20][21]. Even more recently, another route using suitably coupled multimode optomechanical systems [22][23][24][25][26][27][28] has been investigated. Indeed, the interaction of two optical modes with ancillary mechanical modes also allows to produce multiple interfering transfer paths as required.…”