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21 February 2011 Polarization characteristics of plasmonics-based optical waveguides for polarization rotation
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In this paper, we propose a plasmonics-based optical polarization rotator. The proposed structure consists of a slotted waveguide and a metal film. The proposed device is designed using skewing phenomena of propagation waves at the slotted waveguide with metal film by 3D-FDTD method. We have analyzed various structures such as a slotted waveguide, a metal-clad optical waveguide, and a metal-clad optical waveguide with buffer layers. A metal film on the waveguide acts to rapidly rotate the optical polarization, because it has characteristics of slow group velocity according to the metal-clad optical waveguide. Therefore, an ultra-small sized polarization rotator can be realized by the plasmonics-based asymmetric cross sections of waveguides. The length of designed polarization rotator is just 5 μm for 80% polarization rotation ratio.
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Hong-Seung Kim, Tae-Kyeong Lee, Geum-Yoon Oh, and Young-Wan Choi "Polarization characteristics of plasmonics-based optical waveguides for polarization rotation", Proc. SPIE 7933, Physics and Simulation of Optoelectronic Devices XIX, 79332A (21 February 2011);

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