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Rigorous 3D calculation of effects of pit structure in TwoDOS systems
Abstract:
A computer program based on the finite element method is used to study variations in pit visibility for a pit structure that is similar to those used in TwoDOS systems. It is concluded that pit visibility is best enhanced by making the pit width larger, and that destructive interference by making pit depth d =lambda(Poly)/4 (where lambda(Poly) is the wavelength in Polycarbonate) does not play a major role. Also, pit visibility depends strongly on the thickness of the Al layer. The simulations are compared with experiments and with a scalar model.
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