Abstract
Miniaturizing optical devices beyond the diffraction limit is of great importance for high-integration photonic circuits. By directly fabricating a double-slit aperture structure of different sizes in a subwavelength plasmonic waveguide, an ultra-small plasmonic wavelength splitter is realized experimentally. Due to the different slit widths, the surface plasmon polaritons (SPPs) in the opposite directions exhibit anti-phase interferences. As a result, the SPPs excited at different wavelengths can be split to propagate in the opposite directions along the subwavelength plasmonic waveguide. The plasmonic wavelength splitter only occupies a footprint of about on the metal surface, and the splitting wavelengths and their separation can be easily varied by adjusting the structural parameters. This provides it with important applications in the areas of the optical modulating, sensing, and computing networks in highly integrated plasmonic circuits.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Fengyuan Gan, Chengwei Sun, Hongyun Li, Qihuang Gong, and Jianjun Chen
Photon. Res. 6(1) 47-53 (2018)
Yue Yu, Jiangnan Si, Yaying Ning, Minghai Sun, and Xiaoxu Deng
Opt. Lett. 42(2) 187-190 (2017)
Xi Gao, Liang Zhou, Xing Yang Yu, Wei Ping Cao, Hai Ou Li, Hui Feng Ma, and Tie Jun Cui
Opt. Express 23(18) 23270-23277 (2015)