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Split-sideband spectroscopy in slowly modulated optomechanics

Aranas, EB; Fonseca, PZG; Barker, PF; Monteiro, TS; (2016) Split-sideband spectroscopy in slowly modulated optomechanics. NEW JOURNAL OF PHYSICS , 18 , Article 113021. 10.1088/1367-2630/18/11/113021. Green open access

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Abstract

Optomechanical coupling between the motion of a mechanical oscillator and a cavity represents a new arena for experimental investigation of quantum effects on the mesoscopic and macroscopic scale. The motional sidebands of the output of a cavity offer ultra-sensitive probes of the dynamics. We introduce a scheme whereby these sidebands split asymmetrically and show how they may be used as experimental diagnostics and signatures of quantum noise limited dynamics. We show split-sidebands with controllable asymmetry occur by simultaneously modulating the light-mechanical coupling g and the mechanical frequency, ${\omega }_{{\rm{M}}}$—slowly and out-of-phase. Such modulations are generic but already occur in optically trapped set-ups where the equilibrium point of the oscillator is varied cyclically. We analyse recently observed, but overlooked, experimental split-sideband asymmetries; although not yet in the quantum regime, the data suggests that split sideband structures are easily accessible to future experiments.

Type: Article
Title: Split-sideband spectroscopy in slowly modulated optomechanics
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1367-2630/18/11/113021
Publisher version: http://dx.doi.org/10.1088/1367-2630/18/11/113021
Additional information: © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Keywords: Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, cavity optomechanics, levitated nanoparticles, quantum noise, QUANTUM GROUND-STATE, OSCILLATOR
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery-pp.ucl.ac.uk/id/eprint/1532703
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