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

Optics Express
Amir H Safavi-Naeini, Oskar Painter

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 lambda(0) approximately 1.5 mum and a mechanical resonance of frequency omega(m)/2pi approximately 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 studie...Continue Reading

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Citations

Apr 7, 2012·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Ralf LucklumManzhu Ke
Nov 29, 2012·Optics Express·Marcelo DavançoKartik Srinivasan
Mar 14, 2013·Optics Express·Tian-Xue MaXiao-Xing Su
Mar 30, 2011·Optics Express·Thiago P Mayer AlegreOskar Painter
May 12, 2016·Advanced Materials·Farhad JavidKatia Bertoldi
Jul 15, 2016·Optics Express·Hannes PfeiferOskar Painter
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Nov 15, 2013·Nature·Martin Maldovan
Mar 25, 2018·Nature Communications·Alireza SeifMohammad Hafezi
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Jun 15, 2011·Physical Review Letters·E GavartinI Robert-Philip
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Jan 16, 2019·Applied Optics·Zhenqiang RenYongmin Li
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Oct 18, 2014·Physical Review Letters·Hugo Flayac, Vincenzo Savona
Sep 3, 2013·Physical Review Letters·Max Ludwig, Florian Marquardt
May 3, 2014·Physical Review Letters·Amir H Safavi-NaeiniOskar Painter
May 1, 2021·Optics Letters·Chun XiaJimmy Touma

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