Non-invasive terahertz field imaging inside parallel plate waveguides
K. Iwaszczuk, A. Andryieuski, A. Lavrinenko, X.-C. Zhang, P. U. Jepsen
Applied Physics Letters
Volume: 99, Issue: 7, 19 August 2011
071113-1 - 071113-3
We present a non-invasive broadband air photonic method of imaging of the electric field of THz pulses propagating inside a tapered parallel plate waveguide. The method is based on field-enhanced second harmonic generation of the fundamental laser beam in an external electric field. We apply the technique to measure the frequency-dependent reflection coefficient at the end of the waveguide.
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