单负材料光子晶体异质结构的频率响应  

Frequency response of photonic heterostructures consisting of single-negative materials

作　　者：邓新华[1] 刘念华[1] 刘根泉[1] 

机构地区：[1]南昌大学物理系,南昌330031

出　　处：《物理学报》2007年第12期7280-7285,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60268001;10664002);江西省自然科学基金(批准号:0312004)资助的课题.~~

摘　　要：用传输矩阵方法研究了由两种单负材料构成的光子晶体异质结构的透射特性.结果表明,当异质结构具有零有效折射率时,由于迅衰场表面模共振耦合,在异质结构双周期光子晶体的每一个分界面上都会出现隧穿模.零有效折射率隧穿模不受入射角、电磁波偏振态、结构周期数和晶格常数标度等因素影响,并且具有零相位延迟,这一特性可用来设计零相位延迟全向多通道滤波器件.而位于中心两侧的隧穿模随入射角、结构周期数和晶格常数标度的减小都统一由中心向两侧移动.Transmission of multiple heterostructures consisting of two kinds of single-negative materials are studied by transfer matrix method. The results show that the tunneling modes emerge on every interface of dual-periodical dielectric heterostructures when the heterostructure has zero effective refractive index, owing to the resonant coupling of the evanescent-wave-based interface modes. The zero effective refractive index tunneling mode is independent of the incident angle, polarization, period and scale length and have zero phase delay, which can be utilized to design zero-phase-shift omni-directional multiple-channeled filters. However, the tunneling modes situated on both sides of the center shift away from the center with decrease of incident angle, period and scale length.

关 键 词：单负材料 异质结构 传输矩阵 

分 类 号：O482[理学—固体物理] O73[理学—物理]