Photoconductive LT-GaAs Terahertz Antennas: Correlation Between Surface Quality and Emission Strength

  • O. M. Abdulmunem
  • K. I. Hassoon
  • J. Völkner
  • M. Mikulics
  • K. I. Gries
  • J. C. Balzer


We investigate the influence of the surface properties of a low-temperature-grown GaAs photoconductive antenna on the terahertz (THz) emission strength, using a specially designed THz time-domain spectroscopy system. The system allows us to excite six different positions along the 10 μm gap of a coplanar stripline antenna with a length of 10 mm without changing the alignment of the optical or THz beam path. A comparison to the surface roughness and the grain size which are extracted from an atomic force and a scanning electron microscope is given.


THz time-domain spectroscopy Low-temperature grown GaAs Photoconductive antenna Coplanar stripline 


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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • O. M. Abdulmunem
    • 1
  • K. I. Hassoon
    • 2
  • J. Völkner
    • 3
  • M. Mikulics
    • 4
  • K. I. Gries
    • 1
  • J. C. Balzer
    • 1
  1. 1.Department of Physics and Materials Science CenterPhilipps-University of MarburgMarburgGermany
  2. 2.Department of Applied SciencesUniversity of TechnologyBaghdadIraq
  3. 3.Faculty of PhysicsPhilipps University MarburgMarburgGermany
  4. 4.Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich GmbHJülichGermany

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