Abstract
We report on investigations of the angular distribution of the radiation emitted from a terahertz antenna system equipped with a truncated spherical silicon lens. The pattern is calculated by wide-angle interference principles and Huygens-Fresnel diffraction theory. Experimental determination of the radiation pattern is performed by spatially resolved terahertz time-domain spectroscopy. Good agreement between theory and experiment is obtained, and we find that the terahertz beam can be represented by a Gaussian beam emitted from a circular aperture equal to the diameter of the lens.
Original language | English |
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Journal | Optics Letters |
Volume | 20 |
Issue number | 8 |
Pages (from-to) | 807-809 |
Number of pages | 3 |
ISSN | 0146-9592 |
DOIs | |
Publication status | Published - 15 Apr 1995 |
Externally published | Yes |