Davanço, Marcelo and Chan, Jasper and Safavi-Naeini, Amir H. and Painter, Oskar and Srinivasan, Kartik (2012) Slot-mode-coupled optomechanical crystals. . (Submitted) http://resolver.caltech.edu/CaltechAUTHORS:20121102-102236432
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We present a design methodology and analysis of a cavity optomechanical system in which a localized GHz frequency mechanical mode of a nanobeam resonator is evanescently coupled to a high quality factor (Q>10^6) optical mode of a separate nanobeam optical cavity. Using separate nanobeams provides flexibility, enabling the independent design and optimization of the optics and mechanics of the system. In addition, the small gap (≈25 nm) between the two resonators gives rise to a slot mode effect that enables a large zero-point optomechanical coupling strength to be achieved, with g/2π > 300 kHz in a Si_3N_4 system at 980 nm and g/2π ≈900 kHz in a Si system at 1550 nm. The fact that large coupling strengths to GHz mechanical oscillators can be achieved in SiN is important, as this material has a broad optical transparency window, which allows operation throughout the visible and near-infrared. As an application of this platform, we consider wide-band optical frequency conversion between 1300 nm and 980 nm, using two optical nanobeam cavities coupled on either side to the breathing mode of a mechanical nanobeam resonator.
|Item Type:||Report or Paper (Discussion Paper)|
|Additional Information:||© 2012 Optical Society of America. This work has been supported in part by the DARPA MESO program. We thank Vladimir Aksyuk and Jeff Hill for valuable discussions.|
|Group:||IQIM, Institute for Quantum Information and Matter|
|Classification Code:||OCIS codes: 350.4238, 230.5298, 230.1040|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||03 Nov 2012 05:00|
|Last Modified:||27 Dec 2012 02:58|
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