Title :
Planar Optical Waveguide Platform for Gas Sensing Using Liquid Crystal
Author :
Wing Fat Ho ; Hau Ping Chan ; Kun Lin Yang
Author_Institution :
City Univ. of Hong Kong, Kowloon, South Korea
Abstract :
We propose a simple method for detecting chemical gases using liquid crystal on a planar optical waveguide. Through measuring waveguide output power, this method detects changes in the director of liquid crystal molecules as well as the refractive index, which attributed to gas exposure. We demonstrate this idea by constructing a compact and fast-response ethanol gas sensor.
Keywords :
gas sensors; liquid crystal devices; liquid crystals; optical planar waveguides; optical sensors; organic compounds; power measurement; refractive index measurement; chemical gas detection; ethanol gas sensor; liquid crystal molecule; planar optical waveguide platform; refractive index measurement; waveguide output power measurement; Chemical sensors; Ethanol; Optical refraction; Optical sensors; Optical waveguides; Power generation; Ethanol; liquid crystal (LCs); optical sensor; planar lightwave waveguide;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2013.2254596
