Compact polarization rotator based on slotted optical waveguide with buffer layer using surface plasmon polariton

Hong-Seung Kim; Tae-Kyeong Lee; Geum-Yoon Oh; Byeong-Hyeon Lee; Doo-Gun Kim; Young-Wan Choi

doi:10.1117/12.2005135

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14 March 2013 Compact polarization rotator based on slotted optical waveguide with buffer layer using surface plasmon polariton

Hong-Seung Kim, Tae-Kyeong Lee, Geum-Yoon Oh, Byeong-Hyeon Lee, Doo-Gun Kim, Young-Wan Choi

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Proceedings Volume 8619, Physics and Simulation of Optoelectronic Devices XXI; 861923 (2013) https://doi.org/10.1117/12.2005135
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

A novel polarization rotator with asymmetric optical waveguide based on plasmonics is proposed and analyzed for the first time. The polarization rotator using skewing effects at the slotted optical waveguide (SOW) with metal film was designed by 3D-FDTD method. A metal film on the waveguide acts to rapidly rotate the optical polarization, because the plasmonic characteristics of a metal film can induce the slow group velocity through the metal-clad optical waveguide. Here, the optical waveguide with a buffer layer is proposed to reduce the propagation loss. The polarization rotator length of 6 μm is among the shortest reported in the waveguide-type polarization rotators. The polarization conversion efficiency of 98.93 % is observed near 1550 nm along with a propagation loss of -0.43 dB. The proposed structure is smaller than previous polarization rotator with asymmetric optical waveguide and is more effective to control polarizations using by plasmonic effects.

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Hong-Seung Kim, Tae-Kyeong Lee, Geum-Yoon Oh, Byeong-Hyeon Lee, Doo-Gun Kim, and Young-Wan Choi "Compact polarization rotator based on slotted optical waveguide with buffer layer using surface plasmon polariton", Proc. SPIE 8619, Physics and Simulation of Optoelectronic Devices XXI, 861923 (14 March 2013); https://doi.org/10.1117/12.2005135

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