title: Ultraviolet light detection using an optical microcavity.
abstract: Ultraviolet (UV) light exposure is connected to both physical and psychological diseases. As such, there is significant interest in developing sensors that can detect UV light in the mW/cm2 intensity range with a high signal-to-noise ratio. In this Letter, we demonstrate a UV sensor based on a silica integrated optical microcavity that has a linear operating response in both the forward and backward directions from 14 to 53 mW/cm2. The sensor response agrees with the developed predictive theory based on a thermodynamic model. Additionally, the signal-to-noise ratio is above 100 at physiologically relevant intensity levels.
authors.affiliation: Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA.
authors.forename: Audrey
authors.initials: A
authors.lastname: Harker
authors.forename: Simin
authors.initials: S
authors.lastname: Mehrabani
authors.forename: Andrea M
authors.initials: AM
authors.lastname: Armani
mesh_terms: D055620:Optical Phenomena; D012822:Silicon Dioxide; D014466:Ultraviolet Rays
chemical_list: D012822:Silicon Dioxide