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Actuation of micro-optomechanical systems via cavity-enhanced optical dipole forces

Eichenfield, Matt and Michael, Christopher P. and Perahia, Raviv and Painter, Oskar (2007) Actuation of micro-optomechanical systems via cavity-enhanced optical dipole forces. Nature Photonics, 1 (7). pp. 416-422. ISSN 1749-4885. doi:10.1038/nphoton.2007.96.

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Optical forces can produce significant mechanical effects in micro- and nanophotonic systems. Here we demonstrate a novel optomechanical system using a movable, micrometre-scale waveguide evanescently coupled to a high-Q optical microresonator. Micrometre-scale displacements of the waveguide are observed for milliwatt-level optical input powers. Measurement of the spatial variation of the force on the waveguide indicates that it arises from a cavity-enhanced optical dipole force resulting from the stored optical field of the resonator. This force is used to realize an all-optical tunable filter operating with submilliwatt control power. A theoretical model of the system shows that the maximum achievable force is independent of the intrinsic Q of the optical resonator and scales inversely with the cavity mode volume, suggesting that such forces may become even more effective as devices approach the nanoscale.

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Painter, Oskar0000-0002-1581-9209
Additional Information:© 2007 Nature Publishing Group. Received 26 February 2007; accepted 24 May 2007; published 2 July 2007. The authors sincerely thank T. Johnson, P. Barclay and K. Srinivasan for many fruitful discussions and helpful feedback.
Issue or Number:7
Record Number:CaltechAUTHORS:20150317-131335195
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55858
Deposited By: Tony Diaz
Deposited On:17 Mar 2015 21:44
Last Modified:10 Nov 2021 20:51

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