Temperature Tunability of Dielectric/ Liquid Crystal / Dielectric Photonic Crystal Structures
الموضوعات : فصلنامه نانوساختارهای اپتوالکترونیکی
Ali Vahedi
1
(Department of Physics, Tabriz Branch, Islamic Azad University, Tabriz, Iran.)
Tahere Froutan fard kobar olia
2
(Department of Physics, Tabriz Branch, Islamic Azad University, Tabriz, Iran.)
الکلمات المفتاحية: Photonic Crystal, liquid crystal, temperature sensing device, ternary one-dimensional,
ملخص المقالة :
Recently, photonic crystals doped with liquid crystal (LC) material have
gained much research interest. In this article new ternary one-dimensional photonic
crystal introduced and studied. The liquid crystal layer of 5CB and 5PCH is sandwiched
by two dielectric layers. For the first time, we use four structures SiO2/UCF35/CaF2,
SiO2/5CB/CaF2, NFK51/UCF35/NPSK53 and NFK51/5CB/NPSK53. The effect of
temperature on transfer band gap of these photonic crystals is investigated with
transferred matrix method. The results show that in all four structures PBG for
extraordinary ray (ne) is very large than ordinary ray (no) and with increasing of
temperature, PBG shifts to red wavelength. PBG width is very vast and variation of the
figure with respect temperature is very sharp for SiO2/UCF35/CaF2 structure. Also, the
suggested design takes high tunability due to the infiltration of the LC material. One can
use the proposed structure
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