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Phys Rev Lett. 2009 Nov 27;103(22):223901. Epub 2009 Nov 24.

Reactive cavity optical force on microdisk-coupled nanomechanical beam waveguides.

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  • 1Department of Electrical Engineering, Yale University, 15 Prospect Street, New Haven Connecticut 06520, USA.

Abstract

We demonstrate spectrally tuned dispersive and reactive optical force in a cavity optomechanics system that comprises a microdisk and a vibrating nanomechanical beam waveguide. The waveguide coupled to the microdisk acts as a bosonic dissipation channel and its motion modulates the cavity's damping rate. As a result a reactive optical force arises in addition to the normal dispersive force. The cavity enhanced force is not observed at zero detuning but shows asymmetric behavior with a maximum at red-detuned offset. Such reactive cavity backaction force points to new avenues in cavity optomechanics.

PMID:
20366095
[PubMed]
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