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Position-squared coupling in a tunable photonic crystal optomechanical cavity

Paraiso, Taofiq K. and Kalaee, Mahmoud and Zang, Leyun and Pfeifer, Hannes and Marquardt, Florian and Painter, Oskar (2015) Position-squared coupling in a tunable photonic crystal optomechanical cavity. Physical Review X, 5 (4). Art. No. 041024. ISSN 2160-3308. doi:10.1103/PhysRevX.5.041024.

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We present the design, fabrication, and characterization of a planar silicon photonic crystal cavity in which large position-squared optomechanical coupling is realized. The device consists of a double-slotted photonic crystal structure in which motion of a central beam mode couples to two high-Q optical modes localized around each slot. Electrostatic tuning of the structure is used to controllably hybridize the optical modes into supermodes that couple in a quadratic fashion to the motion of the beam. From independent measurements of the anticrossing of the optical modes and of the dynamic optical spring effect, a position-squared vacuum coupling rate as large as g'/2π=245  Hz is inferred between the optical supermodes and the fundamental in-plane mechanical resonance of the structure at ω_m/2π=8.7  MHz, which in displacement units corresponds to a coupling coefficient of g'/2π=1  THz/nm 2. For larger supermode splittings, selective excitation of the individual optical supermodes is used to demonstrate optical trapping of the mechanical resonator with measured g'/2π=46  Hz.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper DOIArticle
Marquardt, Florian0000-0003-4566-1753
Painter, Oskar0000-0002-1581-9209
Additional Information:© 2015 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Received 27 May 2015; revised manuscript received 17 August 2015; published 12 November 2015. The authors thank Marcelo Davanco and Max Ludwig for fruitful discussions, and Alexander Gumann for help with setting up the experiment. This work was supported by the AFOSR Hybrid Nanophotonics MURI, the Institute for Quantum Information and Matter, a NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation, the Alexander von Humboldt Foundation, the Max Planck Society, and the Kavli Nanoscience Institute at Caltech. F. M. acknowledges support from the DARPA ORCHID program, ERC OPTOMECH, and ITN cQOM. T. K. P gratefully acknowledges support from the Swiss National Science Foundation. M. K. was supported by the University of Southern California.
Group:Institute for Quantum Information and Matter, Kavli Nanoscience Institute
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Max Planck SocietyUNSPECIFIED
Kavli Nanoscience InstituteUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
European Research Council (ERC)OPTOMECH
cQOM – Cavity Quantum OptomechanicsUNSPECIFIED
Swiss National Science Foundation (SNSF)UNSPECIFIED
University of Southern CaliforniaUNSPECIFIED
Subject Keywords:Optics, Photonics, Quantum Physics
Issue or Number:4
Record Number:CaltechAUTHORS:20150601-181540094
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57927
Deposited By: Joy Painter
Deposited On:02 Jun 2015 01:36
Last Modified:10 Nov 2021 21:56

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