Compact polarization rotator for silicon-based slot waveguide structures
作者： Jinbiao Xiao , Yin Xu , Jiayuan Wang , Xiaohan Sun
DOI: 10.1364/AO.53.002390
关键词:
摘要: A compact polarization rotator (PR) for silicon-based slot waveguides is proposed, where the region including upper claddings filled with liquid crystals (LCs). With anisotropic features of LCs, transverse field components eigenmodes have almost identical amplitudes, leading to a high modal hybridness. As result, TE (TM) can be rotated efficiently TM (TE) within short length. The numerical results show that PR 11.3 μm in length at an operating wavelength 1.55 μm achieved extinction ratio (ER) (insertion loss) 12.6 (0.22) dB TE-to-TM and 11.5 (0.30) dB TM-to-TE. Moreover, optical bandwidth (TM-to-TE) mode must ∼64(∼29) nm keep ER over 12 (10) dB. In addition, fabrication tolerances structural parameters are investigated, evolution along propagation distance through also demonstrated.
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