Optomechanically-induced transparency in parity-time-symmetric microresonators

Abstract

Optomechanically-induced transparency (OMIT) and the associated slowing of light provide the basis for storing photons in nanoscale devices. Here we study OMIT in parity-time (PT)-symmetric microresonators with a tunable gain-to-loss ratio. This system features a sideband-reversed, non-amplifying transparency , i.e., an inverted-OMIT. When the gain-to-loss ratio is varied, the system exhibits a transition from a PT-symmetric phase to a broken-PT-symmetric phase. This PT-phase transition results in the reversal of the pump and gain dependence of the transmission rates. Moreover, we show that by tuning the pump power at a fixed gain-to-loss ratio, or the gain-to-loss ratio at a fixed pump power, one can switch from slow to fast light and vice versa. These findings provide new tools for controlling light propagation using nanofabricated phononic devices.

Electromagnetically induced transparency in optical microcavities

“…Yan et al [150] investigated the amplification and transparency phenomena in a doublecavity optomechanical system. Jing et al [151] studied OMIT in a parity-time symmetric microcavity with a tunable gain-to-loss ratio. Schemes for ground-state cooling of mechanical resonators using the EIT interference have also been proposed [152][153][154][155][156][157].…”

Controllable optical output fields from an optomechanical system with mechanical driving

“…(20) and (21). Here, we only consider the first sidebands (upper sideband with the frequency ω c + ω q and lower sideband with the frequency ω c − ω q ) by taking the linear approximation in the derivation of Eqs.…”

Highly sensitive optical sensor for precision measurement of electrical charges based on optomechanically induced difference-sideband generation

“…Ta, 42.50.Wk Micromechanical resonators, in combination with a high Q optical cavity via resonantly enhanced feedback-backaction arising from radiation pressure, can be used to manipulate light propagation exotically [1,2] and provides a special platform for performing precision measurement [3][4][5] and force sensors [6,7] due to their important properties of small masses and high integrability. The force sensors based on the optomechanical interaction is usually carried out via the correlations between the measured quantities and output spectra, and precision measurement of electrical charges [8] in an optomechanical system has been suggested based on the effect of optomechanically induced transparency, where sharp transmission features controlled by the control laser beam exhibit Coulomb-interaction dependent effect that can be well understood through the linearization of the optomechanical interactions [9][10][11]. Compared with traditional methods, optomechanical sensors allows for remote sensing via optical fibers and relies free on naturally occurring resonances [3,4].…”

“…The force sensors based on the optomechanical interaction is usually carried out via the correlations between the measured quantities and output spectra, and precision measurement of electrical charges [8] in an optomechanical system has been suggested based on the effect of optomechanically induced transparency, where sharp transmission features controlled by the control laser beam exhibit Coulomb-interaction dependent effect that can be well understood through the linearization of the optomechanical interactions [9][10][11]. Compared with traditional methods, optomechanical sensors allows for remote sensing via optical fibers and relies free on naturally occurring resonances [3,4].…”