Abstract

A theoretical evaluation has been made of the optical loss of anodically oxidized alumina with implanted metallic columns. It has been shown that microcolumns arranged in the alumina film give rise to an optical loss that strongly depends on the direction of polarization. A loss difference between two polarizations, horizontal and vertical to the column axis, is larger than 10 dB/μm in the infrared. Therefore the metal implanted alumina is expected to be an efficient polarizer with large extinction ratio and low insertion loss.

© 1989 Optical Society of America

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