A Caltech Library Service

Modeling dispersive coupling and losses of localized optical and mechanical modes in optomechanical crystals

Eichenfield, Matt and Chan, Jasper and Safavi-Naeini, Amir H. and Vahala, Kerry J. and Painter, Oskar (2009) Modeling dispersive coupling and losses of localized optical and mechanical modes in optomechanical crystals. Optics Express, 17 (22). pp. 20078-20098. ISSN 1094-4087. doi:10.1364/OE.17.020078.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


Periodically structured materials can sustain both optical and mechanical excitations which are tailored by the geometry. Here we analyze the properties of dispersively coupled planar photonic and phononic crystals: optomechanical crystals. In particular, the properties of co-resonant optical and mechanical cavities in quasi-1D (patterned nanobeam) and quasi-2D (patterned membrane) geometries are studied. It is shown that the mechanical Q and optomechanical coupling in these structures can vary by many orders of magnitude with modest changes in geometry. An intuitive picture is developed based upon a perturbation theory for shifting material boundaries that allows the optomechanical properties to be designed and optimized. Several designs are presented with mechanical frequency ∼ 1-10 GHz, optical Q-factor Q_o > 10^7, motional masses m_(eff) ≈ 100 femtograms, optomechanical coupling length L_(OM) < 5 μm, and clampinig losses that are exponentially suppressed with increasing number of phononic crystal periods (radiation-limited mechanical Q-factor Q_m > 10^7 for total device size less than 30 μm).

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Safavi-Naeini, Amir H.0000-0001-6176-1274
Vahala, Kerry J.0000-0003-1783-1380
Painter, Oskar0000-0002-1581-9209
Additional Information:© 2009 Optical Society of America. Received 3 Aug 2009; revised 14 Sep 2009; accepted 22 Sep 2009; published 20 Oct 2009. This work was funded through the NSF under EMT grant no. 0622246, MRSEC grant no. DMR-0520565, and CIAN grant no. EEC-0812072 through University of Arizona.
Funding AgencyGrant Number
Issue or Number:22
Classification Code:OCIS codes: (230.5298) Photonic crystals; (230.4685) Optical microelectromechanical devices; (230.5750) Resonators; (350.4855) Optical tweezers or optical manipulation.
Record Number:CaltechAUTHORS:20091211-121816322
Persistent URL:
Official Citation:Matt Eichenfield, Jasper Chan, Amir H. Safavi-Naeini, Kerry J. Vahala, and Oskar Painter, "Modeling dispersive coupling and losses of localized optical and mechanical modes in optomechanical crystals," Opt. Express 17, 20078-20098 (2009)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16965
Deposited By: Tony Diaz
Deposited On:05 Jan 2010 00:31
Last Modified:08 Nov 2021 23:31

Repository Staff Only: item control page