Tuned switching of surface waves by a liquid crystal cap layer in one-dimensional photonic crystals

被引：8
|
作者：
Hajian, Hodjat [1 ,2 ]
Rezaei, Behrooz [1 ,3 ]
Vala, Ali Soltani [1 ,3 ]
Kalafi, Manoochehr [1 ,3 ]
机构：
[1] Univ Tabriz, Fac Phys, Dept Solid State Phys, Tabriz 51665163, Iran
[2] Islamic Azad Univ, Sci & Res Branch, E Azarbaijan Branch, Young Researchers Club, Tabriz, Iran
[3] Univ Tabriz, Res Inst Appl Phys & Astron, Tabriz 51665163, Iran
来源：
APPLIED OPTICS | 2012年 / 51卷 / 15期
关键词：
NEGATIVE INDEX; STACK SEQUENCE; BAND-GAP; STATES; METAMATERIALS; PERMITTIVITY; PERMEABILITY; SENSITIVITY; MODES;
D O I：
10.1364/AO.51.002909
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, we theoretically study the electromagnetic surface waves localized at the interface between a homogeneous dielectric medium and a semi-infinite, one-dimensional photonic crystal (1D PC). The semi-infinite 1D PC is made of alternative layers of right-handed (RH) and dispersive left-handed (LH) materials in the presence of a liquid crystal (LC) cap layer. In this structure, we derive the surface waves dispersion relation with tunable switching and localization by using an analytical direct matching procedure within the Kronig-Penny model. It is shown that, for both of layer arrangements, the variation of molecules orientation of the LC cap layer acts as an effective tool to tune the type (tuned switching) and localization of the surface waves and it also can create a surface mode with maximum localization in the first frequency bandgap. (C) 2012 Optical Society of America
引用
收藏
页码：2909 / 2916
页数：8
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