Cooling of a mirror in cavity optomechanics with a chirped pulse

TL;DR

This paper explores how chirped optical pulses can enhance cooling of a mirror in cavity optomechanics by transferring thermal fluctuations to the cavity field and suppressing sensitivity to detuning, with numerical analysis showing cavity decay limits.

Contribution

It introduces a novel pulsed-cooling scheme using chirped pulses in cavity optomechanics, improving cooling performance and understanding the role of pulse modulation.

Findings

Chirped pulses transfer thermal fluctuations effectively.

Frequency modulation improves cooling efficiency.

Cavity decay rate limits the cooling performance.

Abstract

We investigate the response of a harmonically confined mirror to an optical pulse in cavity optomechanics. We show that when the pulsed coupling strength takes the form of a chirped pulse, thermal fluctuations of the mirror can be significantly transferred to the cavity field. In addition, the frequency modulation of the pulse could enable a better cooling performance by suppressing the sensitivity of the dependence of detuning and pulse areas. Using numerical investigations, we find that the pulsed-cooling is mainly limited by the cavity-field decay rate.