Temperature Tunability of Dielectric/ Liquid Crystal / Dielectric Photonic Crystal Structures

Recently, photonic crystals doped with liquid crystal (LC) material havegained much research interest. In this article new ternary one-dimensional photoniccrystal introduced and studied. The liquid crystal layer of ۵CB and ۵PCH is sandwichedby two dielectric layers. For the first time, we use four structures SiO۲/UCF۳۵/CaF۲,SiO۲/۵CB/CaF۲, NFK۵۱/UCF۳۵/NPSK۵۳ and NFK۵۱/۵CB/NPSK۵۳. The effect oftemperature on transfer band gap of these photonic crystals is investigated withtransferred matrix method. The results show that in all four structures PBG forextraordinary ray (ne) is very large than ordinary ray (no) and with increasing oftemperature, PBG shifts to red wavelength. PBG width is very vast and variation of thefigure with respect temperature is very sharp for SiO۲/UCF۳۵/CaF۲ structure. Also, thesuggested design takes high tunability due to the infiltration of the LC material. One canuse the proposed structure

Keywords:

Photonic Crystal , liquid crystal , temperature sensing device , ternary one-dimensional