Open AccessTerahertz line detection by a microlens array coupled photoconductive antenna array
Author(s) -
B. Pradarutti,
Ralf Müller,
Wiebke Freese,
Gabor Matthäus,
S. Riehemann,
Gunther Notni,
Stefan Nolte,
Andreas Tünnermann
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.018443
Subject(s) - microlens , optics , terahertz radiation , photoconductivity , optoelectronics , antenna (radio) , materials science , laser , antenna array , excitation , physics , lens (geology) , telecommunications , quantum mechanics , computer science
We present THz ultrashort pulse detection by a photoconductive antenna array consisting of 16 photoconductive antennas. The efficient excitation of the photoconductive antennas has been realized by a microlens array which generates 16 single spots from the exciting fs-laser beam. This combination of optoelectronics and microoptics improves the detection efficiency by an order of magnitude in comparison to an excitation by a line focus.