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Publication
Mid infrared waveguide spectroscopy for cocaine detection in liquid environments
Nico de Rooij, Hans Peter Herzig, Peter Van der Wal, Vincent Paeder, Lubos Hvozdara, Philip Wägli, Yu-Chi Chang, Joab Di Francesco
2012
Conference paper
2012
Conference paper
Abstract
A germanium strip waveguide on a silicon substrate is integrated with a microfluidic chip to detect cocaine in tetrachloroethylene solutions. In the evanescent field of the waveguide, cocaine absorbs the light at 5.8μm, which is emitted from a quantum cascade laser. The lowest measured concentration is 100μg/ml.
Official source
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