Terahertz field enhancement to the MV/cm regime in a tapered parallel plate waveguide

Krzysztof Iwaszczuk, Andrei Andryieuski, Andrei Lavrinenko, X.-C. Zhang, Peter Uhd Jepsen

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    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.
    Original languageEnglish
    JournalOptics Express
    Issue number8
    Pages (from-to)8344-8355
    Publication statusPublished - 2012

    Bibliographical note

    This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-8-8344. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


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