Scattering losses in multidielectric structures designed for giant optical field enhancement
Résumé
Multidielectric coatings are analytically designed to reach total absorption and maximum field enhancement
at resonances. A resonant multi-dielectric stack was fabricated to be resonant at 633 nm for an
incidence of 45° under TE-polarization. Field enhancement was expected to be around 1000. We discuss
the mismatch with the enhancement measured using near field microscopy and using the scattering
effect. In particular, scattering was investigated to serve as a far field characterization of such giant
optical fields.