Oscillatory thermal dynamics in high-Q PDMS-coated silica toroidal microresonators

Opt Express. 2009 Jun 8;17(12):9571-81. doi: 10.1364/oe.17.009571.

Abstract

We study the oscillatory thermal dynamics of a high-Q PDMS-coated silica microtoroid both experimentally and theoretically. We demonstrate that the competing thermo-optic effects in silica and PDMS lead to thermally-induced self-modulation in the transmission spectra. A dynamical model is built using thermal dynamics and coupled-mode theory to analyze the oscillation behaviors. Effects of input power, taper-cavity air gap and wavelength scanning speed on the oscillation behaviors are investigated with a detailed comparison between theory and experiments.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Computer-Aided Design
  • Dimethylpolysiloxanes / chemistry*
  • Equipment Design
  • Equipment Failure Analysis
  • Optical Devices*
  • Oscillometry / instrumentation*
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Silicon Dioxide / chemistry*
  • Transducers*
  • Vibration

Substances

  • Dimethylpolysiloxanes
  • baysilon
  • Silicon Dioxide