Abstract
Traditionally, the optical interference and energy conversion could be modulated by dissipation and dispersion in nonlinear optomechanical systems. Here, in this article, we study the enhancement of dissipative coupling on transparency under generalized optomechanical coupling and theoretically illustrate the generation of optomechanically induced transparency with gain and interference tuning. It enables the enhancement of the controlling of fast (slow) light by an order of magnitude. This unifies the dispersive and dissipative coupling into generalized coupling in the study of optomechanically induced transparency and extends its applications from optical switching to optically controlled amplification under the red-sideband optical pumping.
Highlights
The artificial micrometer-scale energy-level structure of optomechanical systems has led to a variety of applications, such as optomechanically induced transparency (OMIT) [1]–[5], frequency combs [6]–[10], high-precision sensors [11]–[17], mechanical cooling [18]–[22], and light squeezing [23]–[28]
OMIT, as the analog of electromagnetically induced transparency (EIT) [44]–[52], refers to the phenomenon in which the probe light forms a transparency window due to the interference when the dispersive optomechanical behavior is driven by the pump light
We focus on the OMIT under generalized optomechanical coupling, which is no longer limited to separate dispersive or dissipative coupling
Summary
The artificial micrometer-scale energy-level structure of optomechanical systems has led to a variety of applications, such as optomechanically induced transparency (OMIT) [1]–[5], frequency combs [6]–[10], high-precision sensors [11]–[17], mechanical cooling [18]–[22], and light squeezing [23]–[28]. Dispersive coupling refers to the coupling that mechanical motion changes the intrinsic frequency of the optical cavity, and dissipative coupling refers to the coupling that mechanical motion changes the inherent dissipation of the optical cavity This optomechanical system can be implemented by using the small-volume microcavity [65]–[67] or a photonic crystal-cantilever microcavity [12], [68], whose curvature changes significantly with the radius. On this basis, we present an OMIT scheme with amplifiable transparency windows for the generalized optomechanics. In contrast to the previous studies using blue-sideband gain theory [2], [60], [69]–[72], our scheme proves that the optical gain can be produced under the red-sideband pumping
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