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

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

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11j3041g&link_type=abstract

New Journal of Physics, Volume 11, Issue 10, pp. 103041 (2009).

Physics

3

Scientific paper

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 ~10-5 and the resonance linewidth to be estimated.

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