Article

Journal of Infrared, Millimeter, and Terahertz Waves

, Volume 33, Issue 11, pp 1117-1122

First online:

Discrete Terahertz Beam Steering with an Electrically Controlled Liquid Crystal Device

  • Benedikt SchergerAffiliated withFachbereich Physik, Philipps Universität Marburg Email author 
  • , Marco ReuterAffiliated withFachbereich Physik, Philipps Universität Marburg
  • , Maik SchellerAffiliated withFachbereich Physik, Philipps Universität Marburg
  • , Kristian AltmannAffiliated withFachbereich Physik, Philipps Universität Marburg
  • , Nico ViewegAffiliated withFachbereich Physik, Philipps Universität Marburg
  • , Roman DabrowskiAffiliated withInstitute of Chemistry, Military University of Technology
  • , Jason A. DeibelAffiliated withDepartment of Physics, Wright State University
  • , Martin KochAffiliated withFachbereich Physik, Philipps Universität Marburg

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Abstract

We present an electronic beam switching/steering device for operation at THz frequencies. The propagation direction of the THz beam is switched via electronic manipulation of the refractive index of a liquid crystal. The design of the steering device and the parameters of the liquid crystal are described and angle-dependent THz-TDS measurements of the beam steering are reported. This device is able to deflect the propagation direction of the THz beam by 6.3 °. This particular device approach offers a viable option for beam steering/switching in various THz applications including fiber switches, scanning imagers, and free-space communication systems in which the detector or emitter is in motion.

Keywords

THz spectroscopy Quasi-optics Liquid Crystal (LC)