title: Application of dynamic line narrowing in resonant optical sensing.
abstract: We propose a dynamic operational mode and the resulting dynamic line narrowing as a method for enhancing the resolution and the detection limit of high-quality (high-Q) resonant optical sensors. Using a silica microtoroid as an experimental platform, we demonstrate that dynamic line narrowing through the thermo-optic effect can significantly improve the detection limit in both resonant shift and resonance splitting operating modes.
authors.affiliation: Department of Physics and Center for High Technology Materials, University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: Fenfei
authors.initials: F
authors.lastname: Liu
authors.forename: Shoufeng
authors.initials: S
authors.lastname: Lan
authors.forename: Mani
authors.initials: M
authors.lastname: Hossein-Zadeh