Photo-Dember terahertz emitter excited with an Er:fiber laser

A terahertz emitter based on the lateral photo-Dember effect is shown to efficiently generate terahertz radiation with a peak frequency of 0.7 THz and an electric field amplitude up to 5 V/cm when excited by 90 fs pulses centered at 1.55 μm. A thin layer of In_0.53 Ga_0.47 As grown on InP provides the substrate material in which unidirectional lateral photo-Dember currents are excited. Since photo-Dember terahertz emitters do not require an external bias, they do not suffer from high dark currents limiting the application of biased InGaAs photoconductive terahertz emitters.

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KLATT, Gregor, Bernhard SURRER, Daniel STEPHAN, Olaf SCHUBERT, Milan FISCHER, Jérôme FAIST, Alfred LEITENSTORFER, Rupert HUBER, Thomas DEKORSY, 2011. Photo-Dember terahertz emitter excited with an Er:fiber laser. In: Applied Physics Letters. 2011, 98(2), 21114. Available under: doi: 10.1063/1.3543627

BibTex

@article{Klatt2011Photo-13361,
  year={2011},
  doi={10.1063/1.3543627},
  title={Photo-Dember terahertz emitter excited with an Er:fiber laser},
  number={2},
  volume={98},
  journal={Applied Physics Letters},
  author={Klatt, Gregor and Surrer, Bernhard and Stephan, Daniel and Schubert, Olaf and Fischer, Milan and Faist, Jérôme and Leitenstorfer, Alfred and Huber, Rupert and Dekorsy, Thomas},
  note={Article Number: 21114}
}

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Photo-Dember terahertz emitter excited with an Er:fiber laser