title: Liquid crystal based electrically switchable Bragg structure for THz waves.
abstract: We demonstrate the first electronically switchable Bragg structure for THz frequencies. The structure works as stop-band filter and as mirror. It exhibits the 60 GHz broad stop-band around 300 GHz which can be removed by reorienting liquid crystal molecules in an external electric field. Our first proof-of-principle experiments agree very well with transfer matrix calculations.
authors.affiliation: Institute for High-Frequency Technology, Braunschweig, Germany. r.wilk@menlosystems.com
authors.forename: Rafal
authors.initials: R
authors.lastname: Wilk
authors.forename: Nico
authors.initials: N
authors.lastname: Vieweg
authors.forename: Olaf
authors.initials: O
authors.lastname: Kopschinski
authors.forename: Martin
authors.initials: M
authors.lastname: Koch
mesh_terms: D017076:Computer-Aided Design; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008029:Lighting / Q000295:instrumentation*; D050866:Liquid Crystals / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D055053:Terahertz Radiation