Suspended chalcogenide microcavities for ultra-sensitive chemical detection

TitleSuspended chalcogenide microcavities for ultra-sensitive chemical detection
Publication TypeBook Chapter
Year of Publication2016
AuthorsKita, D, Lin, H, Li, J, Han, Z, Su, P, Gu, T, Agarwal, A, Yadav, A, Richardson, K, Hu, J
Book Title2016 Ieee Sensors
PublisherIeee
CityNew York
ISBN Number978-1-4799-8287-5
Keywordsmicroring resonators, photonics
Abstract

Here we report on the fabrication and characterization of air-clad on-chip chalcogenide microdisk cavities (Q = 32,000) at wavelengths of 2.0 - 2.5 microns for infrared spectroscopy. In addition, we analyze a method of photothermal sensing that leverages high-thermal confinement in optical microcavities that is theoretically capable of achieving part-per-billion (ppb) level detection of trace gas molecules.