Optical Tamm states in a hybrid structure with a holographic polymer-liquid crystal grating

被引：2
|
作者：
Reshetnyak, V. Yu. [1 ,2 ]
Pinkevych, I. P. [1 ]
Godman, N. P. [3 ]
Bunning, T. J. [3 ]
Evans, D. R. [3 ]
机构：
[1] Taras Shevchenko Natl Univ Kyiv, Phys Fac, Kiev, Ukraine
[2] Univ Warwick, Dept Phys, Coventry, England
[3] Air Force Res Lab, Mat & Mfg Directorate, Dayton, OH USA
来源：
LIQUID CRYSTALS | 2023年 / 50卷 / 01期
关键词：
Optical Tamm states; liquid crystal; holographic grating; reflection coefficient; PLASMON; MODEL;
D O I：
10.1080/02678292.2023.2179678
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The reflection spectrum of a hybrid structure formed by a metal film and a holographic grating consisting of a sequence of polymer and liquid crystal (LC) layers is theoretically studied. It is shown that in such a hybrid structure, a narrow dip in the reflection spectrum appears in the region of the grating band gap, which is associated with the formation of an optical Tamm state (OTS). The spectral position of the reflection dip depends on the parameters of the polymer and LC. The type of metal and its thickness affect the value of the OTS reflection dip, but they do not affect its spectral position. The dependence of the OTS wavelength on the LC director orientation makes it possible to control the spectral position of the reflection dip using an external electric or magnetic field.
引用
收藏
页码：45 / 53
页数：9
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