Mid-infrared Waveguide Evanescent Field Chemical Sensor for Liquids

Based on a mid-infrared waveguide fabricated from Germanium on Silicon substrates, we present a concept of chemical sensors in aqueous solutions. The sensing scheme is utilizing the evanescent wave in a single-mode waveguide, and the absorption spectrum of chemicals dissolved in liquids. The waveguide is coupled to a singlemode mid-infrared quantum cascade laser [1], and an infrared detector. The wavelength of 5.81 microns is chosen to assure the specifity and sensitivity of the pilot application [2] for the analysis of cocaine analyte, in a water based matrix (saliva). A micro-fluidic system will be used for sample preparations.


Presented at:
Conference on Lasers and Electro Optics - European Quantum Electronics Conference, CLEO Europe 2011, Munich, Germany, May 22-26, 2011
Year:
2011
Keywords:
Laboratories:




 Record created 2011-06-28, last modified 2018-03-18

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