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Terahertz line detection by a microlens array coupled photoconductive antenna array

 
: Pradarutti, B.; Müller, R.; Freese, W.; Matthäus, G.; Riehemann, S.; Notni, G.; Nolte, S.; Tünnermann, A.

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Postprint (308 KByte; PDF; )

Optics Express 16 (2008), Nr.22, S.18443-18450
ISSN: 1094-4087
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IOF ()
terahertz imaging

Abstract
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.

: http://publica.fraunhofer.de/dokumente/N-85729.html