Abstract
Thick lossy dielectric gratings have been analyzed using a Raman-Nath formalism modified to incorporate losses. Four second order coupled-wave equations are retained for accurate computation of the zero; first-, and second-order diffracted beams for a multitude of practical cases. Significant differences are found in comparison to computations in which only two coupled waves are retained. The entire range of losses and thicknesses encountered for holograms in AgBr emulsions has been studied using this unified approach.
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