Abstract
A polarization rotator based on asymmetrical Si nanowires is presented and optimized for high polarization rotation efficiency (almost 100%). The present polarization rotator has a very small conversion length and consequently becomes very compact. The analysis of the wavelength dependence shows the present polarization rotator has a broad bandwidth for high conversion efficiency . The tolerance to various fabrication errors is also numerically studied. To compensate the fabrication error, a postcompensation method is introduced by modifying the refractive index of the up-cladding.
© 2008 Optical Society of America
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