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Published November 1, 2010 | Published
Journal Article Open

Optomechanics in an ultrahigh-Q two-dimensional photonic crystal cavity

Abstract

We demonstrate an ultrahigh-Q slotted two-dimensional photonic crystal cavity capable of obtaining strong interaction between the internal light field and the mechanical motion of the slotted structure. The measured optical quality factor is Q = 1.2×10^6 for a cavity with an effective modal volume of V_(eff) = 0.04(λ)^3. Optical transduction of the thermal motion of the fundamental in-plane mechanical resonance of the structure (ν_m = 151 MHz) is performed, from which a zero-point motion optomechanical coupling rate of g∗/2π = 320 kHz is inferred. Dynamical back-action of the optical field on the mechanical motion, resulting in cooling and amplication of the mechanical motion, is also demonstrated.

Additional Information

© 2010 American Institute of Physics. Received 20 June 2010; accepted 8 October 2010; published online 4 November 2010. A.S.N. and T.P.M.A. contributed equally to this work. This work was supported by the DARPA/MTO ORCHID program through a grant from AFOSR, and the Kavli Nanoscience Institute at Caltech. A.S.N. gratefully acknowledges support from NSERC.

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