Title :
Liquid crystal-tunable metamaterial absorber for THz frequency range
Author :
Grzeskiewicz, B. ; Wolarz, E. ; Sierakowski, A. ; Marczewski, J. ; Palka, Norbert
Author_Institution :
Fac. of Tech. Phys., Poznan Univ. of Technol., Poznan, Poland
Abstract :
A numerical study of the electromagnetic properties of a liquid crystal-tunable metamaterial absorber (LCTMA) is presented. This artificial structure is characterized by an efficient absorption of terahertz electromagnetic radiation in a narrow frequency range. The selective absorption in the metamaterial is tuned by reconfiguration of a thin liquid crystal film separating the metal structures of the metamaterial. The required alignment of liquid crystal (LC) molecules is obtained by a constant voltage application to the metal structures of the absorber. The numerical simulation results of the absorption of LCTMA are compared to the experimental data for a similarly designed planar metamaterial structure.
Keywords :
light absorption; liquid crystals; metallic thin films; numerical analysis; optical films; optical metamaterials; terahertz metamaterials; terahertz wave spectra; LCTMA absorption; THz frequency range; absorber metal structures; artificial structure; constant voltage application; electromagnetic properties; experimental data; liquid crystal molecule alignment; liquid crystal-tunable metamaterial absorber; metamaterial metal structures; narrow frequency range; numerical simulation; planar metamaterial structure; selective absorption; terahertz electromagnetic radiation absorption; thin liquid crystal film reconfiguration; Absorption; Electromagnetics; Magnetic materials; Metals; Metamaterials; Numerical simulation;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2013 7th International Congress on
Conference_Location :
Talence
Print_ISBN :
978-1-4799-1229-2
DOI :
10.1109/MetaMaterials.2013.6808992
