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Updated: May 23, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
Published on: August 30, 2012
Terahertz field enhancement to the MV/cm regime in a tapered parallel plate waveguide
K Iwaszczuk1, A Andryieuski, A Lavrinenko
1DTU Fotonik, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark. kiwa@fotonik.dtu.dk
Abstract:
We investigate field enhancement properties of a tapered parallel plate waveguide for ultrashort terahertz (THz) pulses. We use two independent methods, air biased coherent detection inside the waveguide and free-space electro-optic sampling, respectively, which enables a calibrated, quantitative measurement of the field strength at the output of the waveguide. Field enhancement factors greater than 20 are demonstrated and record-high field strengths of > 1.4 MV/cm are reached. We find an excellent agreement between the two independent methods of field measurement and a numerical 3D full-vectorial time-domain simulations.
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