Abstract
In recent years a wide interest has been spurred by the inverse design of artificial materials for nano-biophotonic applications. In particular, the extreme optical properties of artificial hyperbolic dispersion nanomaterials allowed to access new physical effects and mechanisms. The unbound isofrequency surfaces of hyperbolic metamaterials and metasurfaces allow to access virtually infinite photonic density of states, ultrahigh confinement of electromagnetic fields and anomalous wave propagation. Here, we report the most relevant physical properties of different hyperbolic dispersion material geometries and how they allow to control light-matter interaction at the single nanometer scale, in biological matter.
Highlights
In recent years, plasmonic and dielectric metasurfaces have received a great deal of interest because of the tremendous potential of these deeply subwavelength nano-patterned surfaces in several technological realms
Hyperbolic metamaterials (HMMs) are a class of artificial anisotropic materials, which originates from the concept of optics of crystals [14,15,16]
HMM shows hyperbolic dispersion because the out of plane dielectric component ezz = e⊥ has an opposite sign to the in-plane dielectric components exx = eyy = e||
Summary
Plasmonic and dielectric metasurfaces have received a great deal of interest because of the tremendous potential of these deeply subwavelength nano-patterned surfaces in several technological realms. Metasurfaces allow wavefront engineering, local phase and amplitude control of light along the surface by using dielectric or plasmonic resonators [1,2,3,4]. HMM shows hyperbolic dispersion because the out of plane dielectric component ezz = e⊥ has an opposite sign to the in-plane dielectric components exx = eyy = e||. As it is known, homogenous isotropic materials exhibit spherical dispersion, with the dispersion relation k2x þ k2y þ k2z 1⁄4 ev2=c2. Uniaxial anisotropic materials such as HMMs have a hyperbolic dispersion relation ðk2x þ k2yÞ=ezz þ ðk2zÞ=exx 1⁄4 v2=c2, where the dielectric.
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