Aachen PK 2003 – wissenschaftliches Programm

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P: Plasmaphysik

P 19: Plasma Physics

P 19.1: Vortrag

Freitag, 21. März 2003, 10:30–10:50, FO2

LTG-GaAs photomixers for coherent terahertz radiation sources — •E.A. Michael¹, B. Vowinkler¹, R. Schieder¹, M. Mikulics², M. Marso², and P. Kordos² — ¹1. Physikalisches Institut, Universitaet zu Koeln, Zuelpicher Str. 77, D-50937 Koeln — ²Institut fuer Schichten und Grenzflaechen, Forschungszentrum Juelich

Coherent tunable terahertz sources are necessary for high resolution spectroscopy and astronomical heterodyne receivers, but may also be of importance for future medical diagnosis applications. Photomixing of two near-infrared diode lasers in fast photoconductor structures enables to build terahertz radiation sources with ultimate tunability. In this work we seek to improve power and bandwidth of photomixers based on traveling-wave structures on low-temperature-grown gallium-arsenide (LTG-GaAs) substrates.