Emission and detection of terahertz pulses from a metal-tip antenna

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DOIResolve DOI: http://doi.org/10.1364/JOSAB.22.002357
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TypeArticle
Journal titleJournal of the Optical Society of America B
Volume22
Issue11
Pages23572365; # of pages: 9
SubjectMicrowaves; scanning microscopy; spectroscopy, far infrared; traveling-wave devices; waveguides
AbstractWe investigate the antenna characteristics of a metal tip coupled to terahertz (THz) pulses generated from a photoconductive switch. Enhanced terahertz pulse emission is observed with the metal tip in contact with one of the electrodes of the photoconductive switch. Measurements of the angular dependence of the emitted THz radiation show that the metal tip acts as a highly directional antenna with radiation patterns well described by the theory for long-wire traveling-wave antennas. Similar behavior is observed for the metal tip acting as a THz pulse receiver, in accordance with the reciprocity principle. Effects related to the broadband nature of the THz pulses are discussed.
Publication date
LanguageEnglish
Peer reviewedYes
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NRC number129
NPARC number12338221
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Record identifier729f11b9-cf64-4eab-b796-a5fbfa3fdf86
Record created2009-09-10
Record modified2016-05-09
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