Thermo-optical resonance locking of an optically trapped salt-water microdroplet

Marc Guillon; Rachael E.H. Miles; Jonathan P. Reid; David McGloin

doi:10.1088/1367-2630/11/10/103041

Thermo-optical resonance locking of an optically trapped salt-water microdroplet

Marc Guillon^*, Rachael E.H. Miles, Jonathan P. Reid, David McGloin

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

We demonstrate that it is possible to lock the radius of an optically trapped salt-water microdroplet to the n = 1 whispering gallery resonances (WGRs) at the trapping laser wavelength. The optical properties of the droplet are determined using stimulated Raman scattering. The droplet is in thermodynamic equilibrium with the surrounding vapour and the proposed locking mechanism consists of a balance between bulk heating and WGR heating. Raman measurements allow the size parameter (nka) of the droplet to be determined with a precision of ∼10^-5and the resonance linewidth to be estimated.

Original language	English
Article number	103041
Number of pages	11
Journal	New Journal of Physics
Volume	11
DOIs	https://doi.org/10.1088/1367-2630/11/10/103041
Publication status	Published - 26 Oct 2009

Bibliographical note

Acknowledgements: MG acknowledges the University of Dundee for financial support. DM is a Royal Society
University Research Fellow. REHM and JPR acknowledge Dr Laura Mitchem for preliminary
measurements that contributed to this work. The authors also acknowledge the EPSRC for
financial support for this research and for Leader Fellowship funding for JPR. The authors are
finally grateful to Dr Knox for helpful and stimulating discussions.

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title = "Thermo-optical resonance locking of an optically trapped salt-water microdroplet",

abstract = "We demonstrate that it is possible to lock the radius of an optically trapped salt-water microdroplet to the n = 1 whispering gallery resonances (WGRs) at the trapping laser wavelength. The optical properties of the droplet are determined using stimulated Raman scattering. The droplet is in thermodynamic equilibrium with the surrounding vapour and the proposed locking mechanism consists of a balance between bulk heating and WGR heating. Raman measurements allow the size parameter (nka) of the droplet to be determined with a precision of ∼10-5and the resonance linewidth to be estimated.",

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note = "Acknowledgements: MG acknowledges the University of Dundee for financial support. DM is a Royal Society University Research Fellow. REHM and JPR acknowledge Dr Laura Mitchem for preliminary measurements that contributed to this work. The authors also acknowledge the EPSRC for financial support for this research and for Leader Fellowship funding for JPR. The authors are finally grateful to Dr Knox for helpful and stimulating discussions.",

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AU - Guillon, Marc

AU - Miles, Rachael E.H.

AU - Reid, Jonathan P.

AU - McGloin, David

N1 - Acknowledgements: MG acknowledges the University of Dundee for financial support. DM is a Royal Society University Research Fellow. REHM and JPR acknowledge Dr Laura Mitchem for preliminary measurements that contributed to this work. The authors also acknowledge the EPSRC for financial support for this research and for Leader Fellowship funding for JPR. The authors are finally grateful to Dr Knox for helpful and stimulating discussions.

PY - 2009/10/26

Y1 - 2009/10/26

N2 - We demonstrate that it is possible to lock the radius of an optically trapped salt-water microdroplet to the n = 1 whispering gallery resonances (WGRs) at the trapping laser wavelength. The optical properties of the droplet are determined using stimulated Raman scattering. The droplet is in thermodynamic equilibrium with the surrounding vapour and the proposed locking mechanism consists of a balance between bulk heating and WGR heating. Raman measurements allow the size parameter (nka) of the droplet to be determined with a precision of ∼10-5and the resonance linewidth to be estimated.

AB - We demonstrate that it is possible to lock the radius of an optically trapped salt-water microdroplet to the n = 1 whispering gallery resonances (WGRs) at the trapping laser wavelength. The optical properties of the droplet are determined using stimulated Raman scattering. The droplet is in thermodynamic equilibrium with the surrounding vapour and the proposed locking mechanism consists of a balance between bulk heating and WGR heating. Raman measurements allow the size parameter (nka) of the droplet to be determined with a precision of ∼10-5and the resonance linewidth to be estimated.

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Thermo-optical resonance locking of an optically trapped salt-water microdroplet

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