Liquid crystal based electrically switchable Bragg structure for THz waves | Zendy

R. Wilk | Zendy; Nico Vieweg | Zendy; Olaf Kopschinski | Zendy; Martín Koch | Zendy

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Liquid crystal based electrically switchable Bragg structure for THz waves

Author(s) -

R. Wilk,

Nico Vieweg,

Olaf Kopschinski,

Martín Koch

Publication year - 2009

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.007377

Subject(s) - optics , terahertz radiation , electric field , liquid crystal , materials science , bragg's law , optoelectronics , transfer matrix method (optics) , stopband , physics , diffraction , band pass filter , quantum mechanics

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.

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