Abstract

Polarization-selective gratings are designed by use of rigorous electromagnetic diffraction theory. The polarizing effects are attained by special surface-relief structures. We present a scheme for coding two different optical functions in one diffractive element. It is based on a combination of the scalar diffraction theory and the effective-medium theory. The diffractive element may be regarded as a combination of a phase element and a subwavelength grating.

© 1995 Optical Society of America

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