Discrete terahertz beam steering with an electrically controlled liquid crystal device

Benedikt Scherger, Marco Reuter, Maik Scheller, Kristian Altmann, Nico Vieweg, Roman Dabrowski, Jason A. Deibel, Martin Koch

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)1117-1122
Number of pages6
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Volume33
Issue number11
DOIs
StatePublished - Nov 2012

Keywords

  • Liquid crystal (LC)
  • Quasi-optics
  • THz spectroscopy

ASJC Scopus subject areas

  • Radiation
  • Instrumentation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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