Title :
Photonic crystals for on-off switching of sub-terahertz electromagnetic waves
Author :
Hasek, T. ; Ghattan, Z. ; Wilk, R. ; Shahabadi, Mahmoud ; Koch, Martin
Author_Institution :
Tech. Univ. Braunschweig, Braunschweig
Abstract :
We present a sub-terahertz wave on-off switch based on a two-dimensional photonic crystal (PC). The PC consists of a triangular hole array in high density polyethylene (HDPE). The holes are infiltrated with the nematic liquid crystal 5CB. The transmission of sub-terahertz electromagnetic waves is controlled by an electric field-induced rotation of the nematic axis of the 5CB molecules. The measured extinction ratio of the switch is 13.3 dB at 91GHz. Experimental results are in good agreement with simulations.
Keywords :
microwave switches; nematic liquid crystals; photonic crystals; polymers; submillimetre wave devices; electric field-induced rotation; extinction ratio; frequency 91 GHz; high density polyethylene; nematic liquid crystal; on-off switching; sub-terahertz electromagnetic waves; triangular hole array; two-dimensional photonic crystal; Electromagnetic scattering; Frequency; Liquid crystal displays; Optical modulation; Optical refraction; Optical switches; Optical variables control; Photonic band gap; Photonic crystals; Refractive index;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves, 2008. IRMMW-THz 2008. 33rd International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-2119-0
Electronic_ISBN :
978-1-4244-2120-6
DOI :
10.1109/ICIMW.2008.4665419
