Ultracompact polarization converter with a dual subwavelength trench built in a silicon-on-insulator waveguide.


The design and fabrication of an ultracompact silicon-on-insulator polarization converter is reported. The polarization conversion with an extinction ratio of 16 dB is achieved for a conversion length of only 10 μm. Polarization rotation is achieved by inducing a vertical asymmetry by forming in the waveguide core two subwavelength trenches of different… (More)
DOI: 10.1364/OL.37.000365


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