Abstract

The diffraction properties of thick vector holograms were analyzed with the use of a simple coupled- wave theory. Two eigenpolarizations in the holograms were determined based on the dielectric perturbation, and diffraction efficiencies for the polarizations were calculated by applying the Kogelnik method. The results were compared with those simulated by the finite-difference time-domain method. As a result, it was demonstrated that the diffraction efficiencies calculated by the two methods are in good agreement for any incident polarization when the modulation depth of the anisotropic phase retarda tion is substantially smaller than the mean retardation. In addition, we confirmed that coupled-wave anal ysis provides reasonable accuracy for relatively large modulation in the case of Bragg incidence with eigenpolarization.

© 2010 Optical Society of America

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