Theoretical framework for thin film superfluid optomechanics: towards the quantum regime

Baker, Christopher G., Harris, Glen I., McAuslan, David L., Sachkou, Yauhen, He, Xin and Bowen, Warwick P. (2016) Theoretical framework for thin film superfluid optomechanics: towards the quantum regime. New Journal of Physics, 18 12: . doi:10.1088/1367-2630/aa520d


Author Baker, Christopher G.
Harris, Glen I.
McAuslan, David L.
Sachkou, Yauhen
He, Xin
Bowen, Warwick P.
Title Theoretical framework for thin film superfluid optomechanics: towards the quantum regime
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2016-12-22
Year available 2016
Sub-type Article (original research)
DOI 10.1088/1367-2630/aa520d
Open Access Status DOI
Volume 18
Issue 12
Total pages 12
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Subject 3100 Physics and Astronomy
Abstract Excitations in superfluid helium represent attractive mechanical degrees of freedom for cavity optomechanics schemes. Here we numerically and analytically investigate the properties of optomechanical resonators formed by thin films of superfluid He covering micrometer-scale whispering gallery mode cavities. We predict that through proper optimization of the interaction between film and optical field, large optomechanical coupling rates and single photon cooperativities are achievable. Our analytical model reveals the unconventional behaviour of these thin films, such as thicker and heavier films exhibiting smaller effective mass and larger zero point motion. The optomechanical system outlined here provides access to unusual regimes such as and opens the prospect of laser cooling a liquid into its quantum ground state.
Formatted abstract
Excitations in superfluid helium represent attractive mechanical degrees of freedom for cavity optomechanics schemes. Here we numerically and analytically investigate the properties of optomechanical resonators formed by thin films of superfluid 4He covering micrometer-scale whispering gallery mode cavities. We predict that through proper optimization of the interaction between film and optical field, large optomechanical coupling rates g0 > 2ℼ x 100 kHz and single photon cooperativities C0 > 10 are achievable. Our analytical model reveals the unconventional behaviour of these thin films, such as thicker and heavier films exhibiting smaller effective mass and larger zero point motion. The optomechanical system outlined here provides access to unusual regimes such as g0 > ΩM and opens the prospect of laser cooling a liquid into its quantum ground state.
Keyword Cavity optomechanics
Effective mass
Liquids
Optical resonators
Superfluid helium films
Superfluidity
Third sound
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID CE110001013
FT140100650
Institutional Status UQ
Additional Notes Article number 123025

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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