Cocaine detection by a mid-infrared waveguide integrated with a microfluidic chip |
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| Authors: | Yu-Chi Chang Philip Wägli Vincent Paeder Alexandra Homsy Lubos Hvozdara Peter van der Wal Joab Di Francesco Nico F de Rooij Hans Peter Herzig |
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| Institution: | Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Microengineering, Optics & Photonics Technology Laboratory, Rue A.-L. Breguet 2, Neuchatel, Switzerland. yu-chi.chang@epfl.ch. |
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| Abstract: | A germanium (Ge) strip waveguide on a silicon (Si) substrate is integrated with a microfluidic chip to detect cocaine in tetrachloroethylene (PCE) solutions. In the evanescent field of the waveguide, cocaine absorbs the light near 5.8 μm, which is emitted from a quantum cascade laser. This device is ideal for (bio-)chemical sensing applications. |
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