Title :
Liquid-crystal tunable fishnet terahertz metamaterials
Author :
Zografopoulos, Dimitrios C. ; Beccherelli, Romeo
Author_Institution :
Consiglio Naz. delle Ric., Ist. per la Microelettronica e Microsistemi, Rome, Italy
Abstract :
A liquid-crystal tunable fishnet metamaterial is designed and investigated for use in the terahertz spectrum. A nematic material layer is introduced between the two fishnet metallic structures. Tuning of the nematic molecular orientation is shown to shift the magnetic resonance frequency of the metamaterial and its electromagnetic properties. A shift of 100 GHz is demonstrated for common dielectric and liquid-crystalline materials used in terahertz technology. The response time of the tunable metamaterial is in the millisecond range, orders of magnitude lower than in thus far demonstrated liquid-crystal based terahertz components.
Keywords :
dielectric materials; nematic liquid crystals; optical design techniques; optical metamaterials; optical tuning; terahertz metamaterials; terahertz wave spectra; dielectric materials; electromagnetic properties; liquid-crystal tunable fishnet terahertz metamaterial design; magnetic resonance frequency shift; nematic material layer; nematic molecular orientation tuning; terahertz spectrum; Indexes; Liquid crystals; Magnetic materials; Metamaterials; Permeability; Refractive index; Switches; Terahertz metamaterials; liquid crystals; negative index materials;
Conference_Titel :
Photonics Technologies, 2014 Fotonica AEIT Italian Conference on
Conference_Location :
Naples
Print_ISBN :
978-8-8872-3718-4
DOI :
10.1109/Fotonica.2014.6843854
