|Title||Suspended chalcogenide microcavities for ultra-sensitive chemical detection|
|Publication Type||Book Chapter|
|Year of Publication||2016|
|Authors||Kita, D, Lin, H, Li, J, Han, Z, Su, P, Gu, T, Agarwal, A, Yadav, A, Richardson, K, Hu, J|
|Book Title||2016 Ieee Sensors|
|Keywords||microring resonators, photonics|
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.