title: Ultra-sensitive thermometer based on a compact optical resonator.
abstract: This article demonstrates a thermometer based on millimeter-scale crystalline disk optical-resonator. By measuring the relative speed difference between 2 colors of light that travel inside the disk, the temperature changes of the disk was measured with a precision of 30 billionths of a degree.
authors.affiliation: Institute for Photonics and Advanced Sensing and School of Chemistry and Physics; University of Adelaide; South Australia, Australia; School of Physics; University of Western Australia; Crawley, Western Australia, Australia.
authors.forename: Wenle
authors.initials: W
authors.lastname: Weng
authors.affiliation: Institute for Photonics and Advanced Sensing and School of Chemistry and Physics; University of Adelaide; South Australia, Australia; School of Physics; University of Western Australia; Crawley, Western Australia, Australia.
authors.forename: Andre N
authors.initials: AN
authors.lastname: Luiten
keywords: Nano-Kelvin resolution; optical resonator; thermo-optic effect; thermometry; whispering gallery mode