Extremely high efficient coupling between long range surface plasmon polariton and dielectric waveguide mode

Fang Liu; Ruiyuan Wan; Yunxiang Li; Yidong Huang; Yoshikatsu Miura; Dai Ohnishi; Jiangde Peng
August 2009
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p091104
Academic Journal
To connect the surface plasmon polariton (SPP) based devices with the conventional dielectric devices is a significant issue for the further development of SPP and related applications. In this paper, extremely high efficient coupling (>99%) between long range SPP (LRSPP) waveguide mode and TM mode of dielectric waveguide has been demonstrated from a hybrid coupler, which composed of an Au (LRSPP) waveguide and a SiN (dielectric) waveguide. Based on this hybrid coupler, a polarization splitter with pure TM mode output from one arm and TE mode output from the other arm with high TE/TM extinction ratio has been realized.


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