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

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1364/JOSAB.22.002357
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FormatText, Article
SubjectMicrowaves; scanning microscopy; spectroscopy, far infrared; traveling-wave devices; waveguides
Abstract
We 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
In
  • Journal of the Optical Society of America B 22, no. 11 (1 November 2005): 2357–2365.
LanguageEnglish
Peer reviewedYes
NRC publication
This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NRC number129
NPARC number12338221
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Record identifier729f11b9-cf64-4eab-b796-a5fbfa3fdf86
Record created2009-09-10
Record modified2020-04-07
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