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Broadband polarization-converting mirror for the visible region of the spectrum

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Abstract

A mirror structure that enables the polarization of linearly polarized light to be rotated by 90° over the entire visible region of the spectrum is presented. Theoretical modeling is used to show that this phenomenon occurs for light that is normally incident upon a metal grating consisting of a series of high and narrow ridges that are oriented at 45° to the polarization angle. This broad polarization-conversion band is shown to arise from mode mixing of surface plasmon polariton-mediated polarization-conversion bands and interference-mediated polarization-conversion bands.

© 2002 Optical Society of America

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