Open AccessAll-polymer whispering gallery mode resonators for gas sensing
Author(s) -
Cédric LemieuxLeduc,
Régis Guertin,
Marc-Antoine Bianki,
Yves-Alain Peter
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.417703
Subject(s) - materials science , whispering gallery wave , polymer , optics , sensitivity (control systems) , radius , humidity , resonator , optoelectronics , composite material , physics , computer security , electronic engineering , computer science , engineering , thermodynamics
Sensitivity of polymeric microdisks is evaluated for selected compounds in their vapor phase such as humidity, isopropanol, toluene, limonene, 1-butanol, and pentanoic acid (valeric acid). Among these compounds, pentanoic acid exhibits the highest sensitivity (23 pm/ppm) with a limit of detection estimated to be around 0.6 ppm. We are interested in the contribution of the geometry deformation due to polymer swelling on the sensitivity as it may be engineered to improve performance of gas sensing devices. Experimental observations show a trend where sensitivity to humidity increased with the ratio of the undercut over the radius of the microcavity.