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

Research output: Contribution to journalArticle (Academic Journal)peer-review

23 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 similar to 10(-5) and the resonance linewidth to be estimated.

Original languageEnglish
Article number103041
Number of pages10
JournalNew Journal of Physics
Volume11
DOIs
Publication statusPublished - 26 Oct 2009

Keywords

  • STIMULATED RAMAN-SCATTERING
  • DROPLETS
  • MODES

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