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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 19 — Sep. 23, 2013
  • pp: 21961–21969

Waveguide coupled air-slot photonic crystal nanocavity for optomechanics

Wataru Shimizu, Naomi Nagai, Kenta Kohno, Kazuhiko Hirakawa, and Masahiro Nomura  »View Author Affiliations

Optics Express, Vol. 21, Issue 19, pp. 21961-21969 (2013)

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We investigate a structure consisting of two parallel GaAs thin membranes with an air-slot type photonic crystal (PhC) nanocavity, which is designed to achieve highly efficient optomechanical coupling. The structure shows a large theoretical optomechanical coupling factor of ~990 GHz/nm. We designed, fabricated, and performed optical characterization of a system consisting of a grating coupler, a PhC waveguide, and a PhC nanocavity, which achieves highly efficient vertical emission using the band folding technique. The experimentally obtained overall efficiency is about 0.3% for a microscope objective lens with a moderate numerical aperture of 0.65. This waveguide coupled air-slot PhC nanocavity with efficient vertical light coupling can be useful for on-chip cavity optomechanical systems.

© 2013 OSA

OCIS Codes
(140.3320) Lasers and laser optics : Laser cooling
(140.3945) Lasers and laser optics : Microcavities
(050.5298) Diffraction and gratings : Photonic crystals
(120.4880) Instrumentation, measurement, and metrology : Optomechanics

ToC Category:
Photonic Crystals

Original Manuscript: June 18, 2013
Revised Manuscript: August 12, 2013
Manuscript Accepted: September 4, 2013
Published: September 11, 2013

Wataru Shimizu, Naomi Nagai, Kenta Kohno, Kazuhiko Hirakawa, and Masahiro Nomura, "Waveguide coupled air-slot photonic crystal nanocavity for optomechanics," Opt. Express 21, 21961-21969 (2013)

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