Low-power phonon lasing through position-modulated Kerr-type nonlinearity

TL;DR

This paper introduces a low-power phonon lasing mechanism in cavity optomechanics utilizing a nonlinear position-modulated Kerr interaction, enabling efficient amplification at minimal power levels.

Contribution

It demonstrates a novel approach to phonon lasing using nonlinear Kerr-type interactions that significantly enhance cooperativity at low power.

Findings

Achieves phonon lasing with weak driving strength

Enhances cooperativity through nonlinear position modulation

Provides a phase-preserving, low-power amplification method

Abstract

We demonstrate low-power amplification process in cavity optomechanics (COM). This operation is based on the nonlinear position-modulated self-Kerr interaction. Owing to this nonlinear term, the effective coupling highly scales with the photon number, resulting in a giant enhancement of the cooperativity. Even for small nonlinearity, the system reaches the amplification threshold for weak driving strength, leading to low-power phonon lasing. This amplifier can be phase-preserving and provides a practical advantage related to the power consumption issues. This work opens up new avenues to realize low-power and efficient amplifiers in optomechanics and related fields.