Resonant absorption of a chemically sensitive layer based on waveguide gratings

A colorimetric sensor providing a direct visual indication of chemical contamination was developed. The sensor is a combination of a chemically sensitive dye layer and a resonant waveguide grating. Enhancement of the light absorption by the photonic structure can be clearly seen. The detection is based on the color change of the reflected light after exposure to a gas or a liquid. Low-cost fabrication and compatibility with environments where electricity cannot be used make this device very attractive for applications in hospitals, industries, with explosives, and in traffic.


Published in:
Applied Optics, 52, 3, 340-349
Year:
2013
Publisher:
Optical Society of America
ISSN:
0003-6935
Keywords:
Laboratories:




 Record created 2013-01-18, last modified 2018-03-17

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