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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
Published on: August 30, 2012
Deep-probe metal-clad waveguide biosensors
N Skivesen1, R Horvath, S Thinggaard
1Risø National Laboratory, Optics and Plasma Research Department, DK-4000 Roskilde, Denmark.
Abstract:
Two types of metal-clad waveguide biosensors, so-called dip-type and peak-type, are analyzed and tested. Their performances are benchmarked against the well-known surface-plasmon resonance biosensor, showing improved probe characteristics for adlayer thicknesses above 150-200 nm. The dip-type metal-clad waveguide sensor is shown to be the best all-round alternative to the surface-plasmon resonance biosensor. Both metal-clad waveguides are tested experimentally for cell detection, showing a detection limit of 8-9 cells/mm2.

