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Multichannel THz line detection by a microlens array excited photoconductive antenna way

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


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Microwave Theory and Techniques Society:
33rd International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2008. Vol.2 : 16th International Conference on Terahertz Electronics; 15.-19.9.2008 Pasadena, California, USA
New York, NY: IEEE, 2008
ISBN: 978-1-4244-2120-6
ISBN: 978-1-4244-2119-0
International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) <33, 2008, Pasadena/Calif.>
International Conference on Terahertz Electronics <16, 2008, Pasadena/Calif.>
Fraunhofer IOF ()

We present multichannel 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 creates 16 single spots from the exciting fs-laser beam. The detected THz signal/noise ratio has been improved by an order of magnitude in comparison to an excitation by a line focus.