A 4-way wavelength demultiplexer based on the plasmonic broadband slow wave system
A 4-way wavelength demultiplexer based on the plasmonic broadband slow wave system
复制标题
基于等离子体宽带慢波系统的四路波长解复用器
DOI：
10.1364/oe.22.021589
复制
发表时间：
2014-09-08
期刊：
影响因子：
3.8
通讯作者：
Yang, Bao Jia
中科院分区：
文献类型：
--
作者：
Zhou, Yong Jin;Yang, Bao Jia
提出了一种基于薄金属-绝缘体-金属（MIM）渐变光栅结构的宽带慢波系统，该光栅结构由两个金属波纹条组成，金属波纹条在薄介质衬底上具有周期性的沟槽阵列。不同频率下的引导欺骗表面等离子体激元（SSPP）可以被定位在沿MEMS MIM光栅的不同位置处。通过在EM波被捕获的位置处引入具有特定长度的特别设计的非波纹MIM分支，被捕获的EM波可以被释放并且沿着沿着这些分支传播。基于这种等离子体宽带慢波系统设计并制作了一个四路波长解复用器。为了提高不同分支之间的隔离度，在一些MIM分支的前端插入带阻滤波器。测试结果与仿真结果吻合良好，验证了四路波分复用器的可行性。(C)2014年美国光学学会
We propose a broadband slow wave system based on the thin metal-insulator-metal (MIM) graded grating structure composed of two corrugated metal strips with periodic array of grooves on a thin dielectric substrate. The guided spoof surface plasmon polaritons (SSPPs) at different frequencies can be localized at different positions along the ultrathin MIM grating. By introducing specially designed non-corrugated MIM branches with specific lengths at the locations where the EM waves are trapped, the trapped EM waves can be released and propagate along these branches. A 4-way wavelength demultiplexer based on such plasmonic broadband slow wave system is then demonstrated and fabricated. To improve the isolations between different branches at lower frequencies, band-reject filters are inserted at the front of some MIM branches. The measurements and the simulation results have shown very good agreements, which validate the feasibility of the 4-way wavelength demultiplexer. (C) 2014 Optical Society of America