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Characterization of radiation pressure and thermal effects in a nanoscale optomechanical cavity

Camacho, Ryan M. and Chan, Jasper and Eichenfield, Matt and Painter, Oskar (2009) Characterization of radiation pressure and thermal effects in a nanoscale optomechanical cavity. Optics Express, 17 (18). pp. 15726-15735. ISSN 1094-4087.

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Optical forces in guided-wave nanostructures have recently been proposed as an effective means of mechanically actuating and tuning optical components. In this work, we study the properties of a photonic crystal optomechanical cavity consisting of a pair of patterned Si_3N_4 nanobeams. Internal stresses in the stoichiometric Si_3N_4 thin-film are used to produce inter-beam slot-gaps ranging from 560-40 nm. A general pump-probe measurement scheme is described which determines, self-consistently, the contributions of thermo-mechanical, thermo-optic, and radiation pressure effects. For devices with 40 nm slot-gap, the optical gradient force is measured to be 134 fN per cavity photon for the strongly coupled symmetric cavity supermode, producing a static cavity tuning greater than five times that of either the parasitic thermo-mechanical or thermo-optic effects.

Item Type:Article
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URLURL TypeDescription
Painter, Oskar0000-0002-1581-9209
Additional Information:© 2009 Optical Society of America. Received 18 Jun 2009; revised 8 Aug 2009; accepted 19 Aug 2009; published 20 Aug 2009. This work was supported by a DARPA seed grant (grant no. HR0011-08-0002) and the National Science Foundation (EMT grant no. 0622246, MRSEC grant no. DMR-0520565, and CIAN grant no. EEC-0812072 through University of Arizona).
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)HR0011-08-0002
Issue or Number:18
Classification Code:OCIS codes: (230.5298) Photonic crystals, (230.4685); Optical microelectromechanical devices, (230.5750); Resonators, (350.4855); Optical tweezers or optical manipulation, (270.5580); Quantum electrodynamics.
Record Number:CaltechAUTHORS:20091001-100940883
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Official Citation:Ryan M. Camacho, Jasper Chan, Matt Eichenfield, and Oskar Painter, "Characterization of radiation pressure and thermal effects in a nanoscale optomechanical cavity," Opt. Express 17, 15726-15735 (2009)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16143
Deposited By: Tony Diaz
Deposited On:15 Oct 2009 19:24
Last Modified:03 Oct 2019 01:07

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