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. (C) 2011 Optical Society of America
Henrik Moodysson Rønnow, Julian Piatek
Didier Albert Simon Vuarnoz, Cyrill Gonin
Tobias Kippenberg, Albert Schliesser