Topology optimization of grating couplers for the efficient excitation of surface plasmons
Topology optimization of grating couplers for the efficient excitation of surface plasmons
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DOI：
10.1364/josab.27.001828
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发表时间：
2010-09-01
影响因子：
1.9
通讯作者：
Sigmund, Ole
中科院分区：
文献类型：
--
作者：
Andkjaer, Jacob;Nishiwaki, Shinji;Sigmund, Ole
我们提出了一种方法，用于在金属-电介质界面处有效激发表面等离子体的光栅耦合器的系统设计。该方法是基于一个二维的拓扑优化配方的基础上的H-极化标量亥姆霍兹方程和有限元方法模拟。该方法的效率证明了输入和输出光栅耦合器的Ag-SiO2接口的优化设计。结果表明，倾斜格罗夫光栅可以提高耦合效率超过68%，而以前的最高值为50%。(C)2010年美国光学学会
We propose a methodology for a systematic design of grating couplers for efficient excitation of surface plasmons at metal-dielectric interfaces. The methodology is based on a two-dimensional topology optimization formulation based on the H-polarized scalar Helmholtz equation and finite-element method simulations. The efficiency of the method is demonstrated by optimized designs for input and output grating couplers for an Ag-SiO2 interface. The results indicate that slanted grove gratings may raise the coupling efficiency above 68% where the highest previously reported value was 50%. (C) 2010 Optical Society of America