Impulsive terahertz radiation with high electric fields from an amplifier-driven large-area photoconductive antenna.

@article{Beck2010ImpulsiveTR,
  title={Impulsive terahertz radiation with high electric fields from an amplifier-driven large-area photoconductive antenna.},
  author={Matthias Beck and H. Reiner Schaefer and Gregor Klatt and Jure Demsar and Stephan Winnerl and M. Helm and Thomas Dekorsy},
  journal={Optics express},
  year={2010},
  volume={18 9},
  pages={9251-7}
}
We report on the generation of impulsive terahertz (THz) radiation with 36 kV/cm vacuum electric field (1.5 mW average thermal power) at 250 kHz repetition rate and a high NIR-to-THz conversion efficiency of 2 x 10(-3). This is achieved by photoexciting biased large-area photoconductive emitter with NIR fs pulses of microJ pulse energy. We demonstrate focussing of the THz beam by tailoring the pulse front of the exciting laser beam without any focussing element for the THz beam. A high dynamic… CONTINUE READING

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