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Design of optomechanical cavities and waveguides on a simultaneous bandgap phononic-photonic crystal slab

Safavi-Naeini, Amir H. and Painter, Oskar (2010) Design of optomechanical cavities and waveguides on a simultaneous bandgap phononic-photonic crystal slab. Optics Express, 18 (14). pp. 14926-14943. ISSN 1094-4087. http://resolver.caltech.edu/CaltechAUTHORS:20100805-085450609

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Abstract

In this paper we study and design quasi-2D optomechanical crystals, waveguides, and resonant cavities formed from patterned slabs. Two-dimensional periodicity allows for in-plane pseudo-bandgaps in frequency where resonant optical and mechanical excitations localized to the slab are forbidden. By tailoring the unit cell geometry, we show that it is possible to have a slab crystal with simultaneous optical and mechanical pseudo-bandgaps, and for which optical waveguiding is not compromised. We then use these crystals to design optomechanical cavities in which strongly interacting, co-localized photonic-phononic resonances occur. A resonant cavity structure formed by perturbing a "linear defect" waveguide of optical and acoustic waves in a silicon optomechanical crystal slab is shown to support an optical resonance at wavelength λ_0 ≈ 1.5 μm and a mechanical resonance of frequency ω_m/2π ≈ 9.5 GHz. These resonances, due to the simultaneous pseudo-bandgap of the waveguide structure, are simulated to have optical and mechanical radiation-limited Q-factors greater than 10^7. The optomechanical coupling of the optical and acousticresonances in this cavity due to radiation pressure is also studied, with a quantum conversion rate, corresponding to the scattering rate of a single cavity photon via a single cavity phonon, calculated to be g/2π = 292 kHz.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1364/OE.18.014926DOIArticle
http://www.opticsinfobase.org/abstract.cfm?URI=oe-18-14-14926PublisherArticle
ORCID:
AuthorORCID
Painter, Oskar0000-0002-1581-9209
Additional Information:© 2010 Optical Society of America. Received 29 Mar 2010; revised 22 Jun 2010; accepted 24 Jun 2010; published 29 Jun 2010. This work was supported by the DARPA/MTO ORCHID program through a grant from AFOSR. ASN gratefully acknowledges support from NSERC.
Funders:
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Classification Code:OCIS codes: (230.1040) Acousto-optical devices; (230.5298) Photonic crystals; Optomechanics; Optomechanical crystals.
Record Number:CaltechAUTHORS:20100805-085450609
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20100805-085450609
Official Citation:Amir H. Safavi-Naeini and Oskar Painter, "Design of optomechanical cavities and waveguides on a simultaneous bandgap phononic-photonic crystal slab," Opt. Express 18, 14926-14943 (2010) http://www.opticsinfobase.org/abstract.cfm?URI=oe-18-14-14926
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19287
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:05 Aug 2010 17:09
Last Modified:02 Feb 2017 04:53

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