Abstract
A compact flexible multifrequency splitter based on an arc waveguide constructed of plasmonic metallic grating structures with graded-height T-grooves is proposed and studied. The dispersion curves and cutoff frequencies of the plasmonic grating waveguides with different T-groove metallic grating heights are different. The guided spoof surface plasmonic polariton waves at different frequencies can be localized at dissimilar angles along the graded grating arc waveguide. The output flexibility at an arbitrary groove for different frequencies is realized by introducing an additional symmetrical T-groove structure as an output. The compact four-, seven-, and eight-output frequency splitters demonstrate its flexible multifrequency separation capability at different output angle locations, while the dimensional size of the frequency splitters is not increased. Measurement results at the microwave frequency display excellent agreement with numerical simulation results.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Yue Yu, Jiangnan Si, Yaying Ning, Minghai Sun, and Xiaoxu Deng
Opt. Lett. 42(2) 187-190 (2017)
Dawei Zhang, Kuang Zhang, Qun Wu, Ruiwei Dai, and Xuejun Sha
Opt. Lett. 43(13) 3176-3179 (2018)
Liangliang Liu, Zhuo Li, Changqing Gu, Bingzheng Xu, Pingping Ning, Chen Chen, Jian Yan, Zhenyi Niu, and Yongjiu Zhao
Opt. Lett. 40(8) 1810-1813 (2015)