Open AccessOscillatory thermal dynamics in high-Q PDMS-coated silica toroidal microresonators
Author(s) -
Lina He,
YunFeng Xiao,
JianGang Zhu,
Şahin Kaya Özdemir,
Lan Yang
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.009571
Subject(s) - oscillation (cell signaling) , thermal , materials science , optics , whispering gallery wave , dynamics (music) , coupled mode theory , wavelength , modulation (music) , transmission (telecommunications) , physics , optoelectronics , refractive index , resonator , thermodynamics , chemistry , acoustics , biochemistry , electrical engineering , engineering
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.