6 September 2006 Understanding diffraction effects in novel systems containing nanostructures
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The recent revelation that diffracted radiance is the fundamental quantity predicted by scalar diffraction theory, combined with the observation that radiance (not irradiance or intensity) is shift-invariant in direction cosine space, has lead to the development of a generalized linear systems formulation of non-paraxial scalar diffraction theory. Thus simple Fourier techniques can now be used to predict a variety of wide-angle diffraction phenomena. These include: (1) the redistribution of radiant energy from evanescent diffracted orders to propagating ones, (2) the angular broadening (and apparent shifting) of wide-angle diffracted orders, and (3) diffraction efficiencies predicted with an accuracy usually thought to require rigorous electromagnetic theory. In addition, this new insight and understanding has led to an empirically modified Brckmann-Kirchhoff surface scatter model that is more accurate than the classical Beckmann-Kirchhoff theory in predicting scatter effects at large incident and scattered angles, without the smooth-surface limitation of the Rayleigh-Rice vector perturbation surface scatter theory. This new understanding of non-paraxial diffraction phenomena is becoming increasingly important in the design and analysis of novel optical systems containing nano-structures.
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James E. Harvey, James E. Harvey, Andrey Krywonos, Andrey Krywonos, } "Understanding diffraction effects in novel systems containing nanostructures", Proc. SPIE 6289, Novel Optical Systems Design and Optimization IX, 62890M (6 September 2006); doi: 10.1117/12.683666; https://doi.org/10.1117/12.683666


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