Quasi-two-dimensional optomechanical crystals with a complete phononic bandgap

A fully planar two-dimensional optomechanical crystal formed in a silicon microchip is used to create a structure devoid of phonons in the GHz frequency range. A nanoscale photonic crystal cavity is placed inside the phononic bandgap crystal in order to probe the properties of the localized acoustic...

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Bibliographic Details
Published inOptics express Vol. 19; no. 6; pp. 5658 - 5669
Main Authors Alegre, Thiago P Mayer, Safavi-Naeini, Amir, Winger, Martin, Painter, Oskar
Format Journal Article
LanguageEnglish
Published United States 14.03.2011
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Summary:A fully planar two-dimensional optomechanical crystal formed in a silicon microchip is used to create a structure devoid of phonons in the GHz frequency range. A nanoscale photonic crystal cavity is placed inside the phononic bandgap crystal in order to probe the properties of the localized acoustic modes. By studying the trends in mechanical damping, mode density, and optomechanical coupling strength of the acoustic resonances over an array of structures with varying geometric properties, clear evidence of a complete phononic bandgap is shown.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.005658