Calculation and optimization of electromagnetic resonances and local intensity enhancements for plasmon metamaterials with sub-wavelength double-slots
Calculation and optimization of electromagnetic resonances and local intensity enhancements for plasmon metamaterials with sub-wavelength double-slots
复制标题
DOI：
10.2528/pier10120604
复制
发表时间：
2011
影响因子：
6.7
通讯作者：
Lin Han;Shuqi Chen;A. Schülzgen;Yong Zeng;F. Song;Jianguo Tian;N. Peyghambarian
中科院分区：
文献类型：
--
作者：
Lin Han;Shuqi Chen;A. Schülzgen;Yong Zeng;F. Song;Jianguo Tian;N. Peyghambarian
提出了两种亚波长双缝超材料--单面双缝超材料和双面双缝超材料。用时域有限差分法和有限元法研究了电磁共振和局部强度增强与结构参数的关系。结果表明，双缝结构的中心臂对高频和低频共振频率和局部强度都有很大的影响。在高频谐振处可以实现很强的场局部化，其特定的分布可以通过中心臂的宽度得到很好的控制，采用双侧双槽结构可以分别增强高频谐振，同时抑制低频谐振。模拟结果进行了讨论的等离子体共振。
We propose two metamaterials with sub-wavelength double-slots — single-side double-slot metamaterial and double-side double-slot metamaterial. The dependence of the electromagnetic resonances and local intensity enhancements on the structural parameters is studied by the finite-difference time-domain technique and the finite element method. Results show that the central-arm of a double-slot structure strongly influences frequency and local intensities at both highand low-frequency resonances. Very strong field localization can be achieved at the high-frequency resonance and its particular distribution can be well controlled by the width of the central-arm. A double-side double-slot structure can be utilized to separately enhance the high-frequency resonance, while suppressing the low-frequency resonance. The simulation results are discussed in terms of plasmon resonances.