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Large-area photoconductive terahertz detectors

: Winnerl, S.; Peter, F.; Nitsche, S.; Dreyhaupt, A.; Drachenko, O.; Schneider, H.; Helm, M.; Köhler, K.

Institute of Electrical and Electronics Engineers -IEEE-:
IRMMW-THz 2007, Joint 32nd International Conference on Infrared and Millimeter Waves, and 15th International Conference on Terahertz Electronics. Vol.2 : City Hall, Cardiff, UK, 3rd - 7rd September, 2007
New York, NY: IEEE, 2007
ISBN: 1-4244-1438-5
ISBN: 978-1-4244-1438-3
International Conference on Infrared and Millimetre Waves <32, 2007, Cardiff>
International Conference on Terahertz Electronics <15, 2007, Cardiff>
Fraunhofer IAF ()

We present a novel non-resonant photoconductive antenna for coherent detection of THz radiation. The antenna consists of an interdigitated electrode structure, where every other electrode gap is covered by a second metallization layer. Different substrate materials with different carrier lifetimes are compared. These antennas are easy to use and offer a high degree of freedom with respect to the focusing of both the THz and the gating beam.