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Coupling into tapered metal parallel plate waveguides using a focused terahertz beam

 
: Gerhard, M.; Theuer, M.; Beigang, R.

:

Applied Physics Letters 101 (2012), No.4, Art. 041109, 4 pp.
ISSN: 0003-6951
ISSN: 1077-3118
English
Journal Article
Fraunhofer IPM ()
Terahertz Spektroskopie

Abstract
Coupling of focused terahertz radiation into tapered metal parallel plate waveguides with sub-wavelength gap widths is presented. A line-focus terahertz time-domain spectroscopy setup with flexible foci is used to investigate coupling of broadband terahertz radiation from free-space into waveguides for different gap widths. Various waveguide lengths are compared in experiment and calculation in terms of occurring loss and divergence phenomena. Amplitude coupling ratios of 80% from free-space into the waveguides are obtained.

: http://publica.fraunhofer.de/documents/N-225677.html