Normal mode splitting in a coupled system of nanomechanical oscillator and parametric amplifier cavity

TL;DR

This paper investigates how an optical parametric amplifier influences the normal mode splitting in a coupled nanomechanical oscillator and cavity system, revealing that parametric gain and laser power significantly affect spectral features.

Contribution

It demonstrates the impact of an intracavity parametric amplifier on mode splitting and spectral line widths in optomechanical systems, a novel insight into controlling coupled oscillator spectra.

Findings

Double-peak spectral structure emerges with increased parametric gain.

Line widths are highly sensitive to parametric gain.

Increasing input laser power enhances the double-peak prominence.

Abstract

We study how an optical parametric amplifier inside the cavity can affect the normal mode splitting behavior of the coupled movable mirror and the cavity field. We work in the resolved sideband regime. The spectra exhibit a double-peak structure as the parametric gain is increased. Moreover, for a fixed parametric gain, the double-peak structure of the spectrum is more pronounced with increasing the input laser power. We give results for mode splitting. The widths of the split lines are sensitive to parametric gain.