Band structure for a one-dimensional photonic crystal containing left-handed materials
Band structure for a one-dimensional photonic crystal containing left-handed materials
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DOI：
10.1103/physrevb.67.235103
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发表时间：
2002-10
影响因子：
3.7
通讯作者：
Liang Wu;Sailing He;Linfang Shen
中科院分区：
文献类型：
--
作者：
Liang Wu;Sailing He;Linfang Shen
给出并分析了左右手材料交替排列的一维周期结构的显式色散方程。在能带结构中观察到一些异常现象，如复频率寄生模、离散模和光子隧穿模。在计算这种光子晶体的能带结构时，存在复频率的寄生模是一个常见的问题。无论LHM层的光学长度是否抵消RHM层的光学长度，离散模式都可以存在。给出了波数为真实的值的离散模和波数为有限区域虚值的光子隧穿模的物理解释和意义。
The explicit dispersion equation for a one-dimensional periodic structure with alternative layers of left-handed material (LHM) and right-handed material (RHM) is given and analyzed. Some unusual phenomena such as spurious modes with complex frequencies, discrete modes and photon tunneling modes are observed in the band structure. The existence of spurious modes with complex frequencies is a common problem in the calculation of the band structure for such a photonic crystal. Discrete modes may exist regardless whether the optical length of the LHM layer cancels the optical length of the RHM layer or not. Physical explanation and significance are given for the discrete modes (with real values of wave number) and photon tunneling propagation modes (with imaginary wave numbers in a limited region).