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A compact, broadband slot waveguide polarization rotator
12. T. Baehr-Jones, M. Hochberg, G. Wang, R. Lawson, P. A. Sullivan, L. Dalton, A. K.-Y. Jen, and A. Scherer, Opt. Express, 13, 5216 (2005).
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We demonstrate a chip-scale compact, broadband polarization rotator on a silicon substrate. Unlike previously demonstrated waveguidepolarization rotators, our approach relies on the adiabatic mode evolution in a single horizontal slot-waveguide, which results in a simple design and one-mask fabrication process.The structure is designed to rotate the TM-polarized input by 90 degree while be transparent with the TE-polarized input. The fabricated device has a total length of 100μm. Transmission spectra show the average polarizationextinction ratios of 20 dB and 15 dB for TE and TM -polarized inputs, respectively.
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