We present optical measurements of the photothermal response of a whispering-gallery silica microresonator in a helium-4 exchange gas cryostat. Using transient-mode numerical simulations, we discuss the various heat propagation mechanisms.
© 2012 OSA
X. Zhou, R. Rivière, O. Arcizet, A. Schliesser, and T. Kippenberg, "Dynamical photothermal response of optical whispering-gallery silica microresonators in helium-4 cryogenic environments," in Conference on Lasers and Electro-Optics 2012, OSA Technical Digest (Optical Society of America, 2012), paper QTh4E.5.
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