Cavity optoelectromechanical regenerative amplification

TL;DR

This paper demonstrates cavity optoelectromechanical regenerative amplification, significantly narrowing the mechanical linewidth of a microtoroid oscillator, with potential applications in ultrasensitive mass spectroscopy.

Contribution

It introduces a novel regenerative amplification technique using an optical cavity to enhance mechanical transduction in optoelectromechanical systems.

Findings

Mechanical linewidth narrowed to 6.6 mHz

Achieved 30-fold improvement over previous radiation pressure methods

Potential for ultrasensitive optomechanical mass spectroscopy

Abstract

Cavity optoelectromechanical regenerative amplification is demonstrated. An optical cavity enhances mechanical transduction, allowing sensitive measurement even for heavy oscillators. A 27.3 MHz mechanical mode of a microtoroid was linewidth narrowed to 6.6\pm1.4 mHz, 30 times smaller than previously achieved with radiation pressure driving in such a system. These results may have applications in areas such as ultrasensitive optomechanical mass spectroscopy.