Reactive Cavity Optical Force on Microdisk-Coupled Nanomechanical Beam Waveguides

Mo Li, Wolfram H. P. Pernice, and Hong X. Tang
Phys. Rev. Lett. 103, 223901 – Published 24 November 2009

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.

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  • Received 17 July 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.223901

©2009 American Physical Society

Authors & Affiliations

Mo Li, Wolfram H. P. Pernice, and Hong X. Tang*

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

  • *hong.tang@yale.edu

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Vol. 103, Iss. 22 — 27 November 2009

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