20 April 2006 Complex transmittance gratings based on subwavelength metallic structures
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Subwavelength metallic structures are used to design gratings with a great variety of transmittance levels. Such gratings can answer growing needs for complex transmittance devices, particularly useful for wave-front analysis applications. Having in mind the conception of a perfectly sinusoidal transmittance for the mid-infrared, we have decided to test the ability of subwavelength lamellar gratings to code the transmittance with several levels. In order to calibrate gratings transmission, as a function of the fill factor, we have designed, realized and measured samples made of six 2mm x 2mm gratings, with transmittance ranging from 10% to 95%. Experimental results for TM- and TE-polarized light are reported and analysed.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. Vincent, G. Vincent, R. Haïdar, R. Haïdar, S. Collin, S. Collin, E. Cambril, E. Cambril, S. Velghe, S. Velghe, J. Primot, J. Primot, F. Pardo, F. Pardo, J.-L. Pelouard, J.-L. Pelouard, } "Complex transmittance gratings based on subwavelength metallic structures", Proc. SPIE 6195, Nanophotonics, 61951K (20 April 2006); doi: 10.1117/12.668533; https://doi.org/10.1117/12.668533

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