Discrete Terahertz Beam Steering with an Electrically Controlled Liquid Crystal Device
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.
Deibel, J. A.,
& Koch, M.
(2012). Discrete Terahertz Beam Steering with an Electrically Controlled Liquid Crystal Device. Journal of Infrared, Millimeter and Terahertz Waves, 33 (11), 1117-1122.