All-dielectric photonic metamaterials operating beyond the homogenization regime

Abstract

Photonic metamaterials made of graded photonic crystals operating near the bandgap frequency region are proposed for field manipulation around λ=1.5µm. Proof-of-concept structures have been studied using Hamiltonian optics and FDTD simulation, fabricated, and characterized using farfield optical measurements. Experimental results are in good agreement with predictions, showing the interest of graded photonic crystals as an (ultra-low loss) alternative solution to the use of metamaterials combining dielectric and metallic materials with sub-wavelength unit cells.

Superluminal media formed by photonic crystals for transformation optics-based invisibility cloaks

“…Among publications on PhCs, only a few works considered Mie resonances [25,26], and only a few earlier studies on MMs paid attention to the specifics of dispersion diagrams of DR arrays [27,28]. Although some recent works have started considering problems of dispersive MMs and photonic crystals with MM-like features [29][30][31][32][33], the common view expressed in earlier works on both classes of periodic structures, i.e. that Mie resonances should cause opening of new bandgaps for heavy photons in the dispersion diagrams, still prevails.…”