Enhancement of three-mode optomechanical interaction by feedback-controlled light

Journal article (2017)

Authors

Nenad Kralj University of Camerino

Massimiliano Rossi University of Camerino

Stefano Zippilli Istituto Nazionale di Fisica Nucleare - Sezione di Perugia, University of Camerino

Riccardo Natali University of Camerino, Istituto Nazionale di Fisica Nucleare - Sezione di Perugia

A. Borrielli Trento Institute for Fundamental Physics and Application, Institute of Materials for Electronics and Magnetism, Nanoscience-Trento-FBK Division

G. Pandraud EKL Processing -

E. Serra Electronic Components, Technology and Materials - , Trento Institute for Fundamental Physics and Application

Giovanni Di Giuseppe Istituto Nazionale di Fisica Nucleare - Sezione di Perugia, University of Camerino

David Vitali University of Camerino, Istituto Nazionale di Fisica Nucleare - Sezione di Perugia

Research Group

EKL Processing () (TU Delft)

Mechanical resonators Cavity optomechanics In-loop optical fields Optical measurement and feedback

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Published Date

2017

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Else Kooi Laboratory

Research Group

EKL Processing

Abstract

We realise a feedback-controlled optical Fabry-Pérot cavity in which the transmitted cavity output is used to modulate the input amplitude fluctuations. The resulting phase-dependent fluctuations of the in-loop optical field, which may be either sub-shot or super-shot noise, can be engineered to favourably affect the optomechanical interaction with a nanomechanical membrane placed within the cavity. Here we show that in the super-shot-noise regime ('anti-squashed light') the in-loop field has a strongly reduced effective cavity linewidth, corresponding to an increased optomechanical cooperativity. In this regime, feedback improves the simultaneous resolved-sideband cooling of two nearly degenerate membrane mechanical modes by one order of magnitude.

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