Wavefront shaping enhanced nano-optomechanics down to the quantum precision limit

TL;DR

This paper demonstrates that wavefront shaping significantly enhances nano-optomechanical measurement sensitivity, achieving near-quantum limit precision by optimizing signal-to-noise ratio in a focused laser-cantilever system.

Contribution

It introduces wavefront shaping as a novel method to improve the sensitivity of nano-optomechanical measurements, approaching the quantum precision limit.

Findings

350-fold increase in measurement signal-to-noise ratio

Close to quantum precision limit achieved

Wavefront shaping outperforms standard detection methods

Abstract

We introduce wavefront shaping as a tool for optimizing the sensitivity in nano-optomechanical measurement schemes. We perform multimode output analysis of an optomechanical system consisting of a focused laser beam coupled to the transverse motion of a tapered cantilever, and demonstrate that wavefront shaping enables a 350-fold enhancement of the measurement signal-to-noise (+25.5 dB) compared to standard split-detection, close to the quantum precision limit. Our results open new perspectives in terms of sensitivity and control of the optomechanical interaction.