Femtosecond response of a free-standing LT-GaAs photoconductive switch.

  title={Femtosecond response of a free-standing LT-GaAs photoconductive switch.},
  author={Xuemei Zheng and Ying Xu and Roman Sobolewski and Roman Adam and M. Mikulics and M. Siegel and Peter Kordos},
  journal={Applied optics},
  volume={42 9},
We present a novel, free-standing low-temperature GaAs (LT-GaAs) photoconductive switch and demonstrate its femtosecond performance. A 1-microm-thick layer of a single-crystal LT-GaAs was patterned into 5-10-microm-wide and 15-30-microm-long bars, separated from their GaAs substrate and, subsequently, placed across gold coplanar transmission lines deposited on a Si substrate, forming a photoconductive switch. The switch was excited with 110-fs-wide optical pulses, and its photoresponse was… CONTINUE READING
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