Multi-dielectric stacks as a platform for giant optical field
Résumé
Multi-dielectric thin films are usually studied as waveguiding structures with low absorption effect
because of the low imaginary part of the refractive index. However, when properly designed, we
demonstrated that multi-dielectric stacks can sustain large optical fields. We briefly present here
our design method leading the fabrication of such multi-dielectric stacks, which can be optimized
for arbitrary wavelengths, indices or polarizations. We then report on our experimental character-
ization in near and far field, using a photon scanning tunneling microscope and scattering optical
setup, respectively. This investigation may find applications for ultra-sensitive optical sensors or
integrated light sources to mention a few.