Abstract
An efficient TE–TM polarization converter built on a silicon-on-insulator nanophotonic platform is demonstrated. The strong cross-polarization coupling effect in air-cladded photonic-wire waveguides is employed to realize the conversion. A peak TE–TM coupling efficiency of 87% ( insertion loss) is measured experimentally. A polarization conversion efficiency of with an overall insertion loss of is obtained in a wavelength range of . The proposed device is compact, with a total length of and can be fabricated with one lithography and etching step.
© 2011 Optical Society of America
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