Cocaine detection by a mid-infrared waveguide integrated with a microfluidic chip.
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.
Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Microengineering, Optics & Photonics Technology Laboratory, Rue A.-L. Breguet 2, Neuchâtel, Switzerland. yu-chi.chang@epfl.ch
Yu-Chi
YC
Chang
Philip
P
Wägli
Vincent
V
Paeder
Alexandra
A
Homsy
Lubos
L
Hvozdara
Peter
P
van der Wal
Joab
J
Di Francesco
Nico F
NF
de Rooij
Hans
H
Peter Herzig
D003042:Cocaine / Q000032:analysis*; D005857:Germanium / Q000737:chemistry; D054023:Lasers, Semiconductor; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods*; D012825:Silicon / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013750:Tetrachloroethylene / Q000737:chemistry
D005857:Germanium; D003042:Cocaine; D013750:Tetrachloroethylene; D012825:Silicon