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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 5 — Mar. 2, 2009
  • pp: 3802–3817

Optical and mechanical design of a “zipper” photonic crystal optomechanical cavity

Jasper Chan, Matt Eichenfield, Ryan Camacho, and Oskar Painter  »View Author Affiliations

Optics Express, Vol. 17, Issue 5, pp. 3802-3817 (2009)

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Design of a doubly-clamped beam structure capable of localizing mechanical and optical energy at the nanoscale is presented. The optical design is based upon photonic crystal concepts in which patterning of a nanoscale-cross-section beam can result in strong optical localization to an effective optical mode volume of 0.2 cubic wavelengths ((λc )3). By placing two identical nanobeams within the near field of each other, strong optomechanical coupling can be realized for differential motion between the beams. Current designs for thin film silicon nitride beams at a wavelength of λ = 1.5 μ m indicate that such structures can simultaneously realize an optical Q -factor of 7 × 106, motional mass mu ~ 40 picograms, mechanical mode frequency Ω M /2π ~ 170 MHz, and an optomechanical coupling factor (gOM = dω c /dx = ω c /Lom) with effective length LOM ~ λ = 1.5 μm.

© 2009 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

Original Manuscript: January 5, 2009
Revised Manuscript: February 25, 2009
Manuscript Accepted: February 25, 2009
Published: February 26, 2009

Jasper Chan, Matt Eichenfield, Ryan Camacho, and Oskar Painter, "Optical and mechanical design of a “zipper” photonic crystal optomechanical cavity," Opt. Express 17, 3802-3817 (2009)

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