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Polarization conversion from an aluminized triangular grating in conical mountings

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We investigate, experimentally and numerically, polarization conversion from an aluminized echelette grating in regions near the resonant excitation of surface plasmons. Particular attention is paid to the difference between curves of the zeroth order cross-polarization reflection coefficients R sp and R ps versus angle of incidence, a quantity that, if not zero, indicates asymmetry of the grating grooves. The results presented here show that, due to the high conductivity of aluminium, differences between cross-polarization coefficients are small, except at those conical configurations where polarization conversion is most enhanced through the excitation of surface plasmons.

Document Type: Research Article


Affiliations: Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina

Publication date: February 1, 2004

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