A traveling-wave THz photomixer based on angle-tuned phase matching

Creators: Matsuura, Shuji; Blake, Geoffrey A.; Wyss, Rolf A.; Pearson, J. C.; Kadow, Christopher; Jackson, Andrew W.; Gossard, Arthur C.

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Abstract

A traveling-wave THz photomixer based on a free-space optical-THz phase-matching scheme is proposed. A dc-biased coplanar strip line fabricated on low-temperature-grown GaAs serves as the active area of the device, and is illuminated by two noncollinear laser beams which generate interference fringes that are accompanied by THz waves. The device with the laser-power-handling capability over 300 mW and a 3-dB bandwidth of 1.8 THz was experimentally demonstrated. The results show that traveling-wave photomixers have the potential to surpass small-area designs.

Additional Information

© 1999 American Institute of Physics. (Received 5 January 1999; accepted 12 March 1999) The authors would like to thank T. E. Turner in the Microelectronics Device Laboratory at JPL for device fabrication. This research was sponsored by the Jet Propulsion Laboratory, California Institute of Technology, and the National Aeronautics and Space Administration. The work performed at UCSB was supported by the Center for Nonstoichiometric III–V Semiconductors.

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