All-angle negative refraction for visible light from left-handed metallo-dielectric photonic crystal: theoretical and numerical demonstration with nanophotonic device application

An artificially engineered structure of nano-inclusion made of metallic nano-rods embedded in a dielectric (ɛ=12.96) matrix with hexagonal arrangement is proposed to demonstrate All-angle Negative Refraction (AANR) for the visible region. AANR with negative index is obtained by applying Surface Plasmon Polariton Excitation (SPPE) in Metallo-Dielectric Photonic Crystal (MDPC) operating in a dispersion regime with anti-parallel refracted wave vector and Poynting vector. It is shown that the proposed MDPC structure provides negative values of permeability (μ) and permittivity (ɛ) and shows their dependence on its structural parameters. The phase slope and phase velocity are shown to be negative for blue light in the proposed MDPC with index-matching to the incident medium. The Finite Difference Time Domain (FDTD) method is employed to study the left-handed transmission and reflection properties. The far-field spectrum for the proposed MDPC is also shown to confirm left-handed transmission for the blue region of visible light. Further, the proposed design of MDPC is also extended to achieve negative refraction for all rainbow colors having applications in the design and development of nanophotonic devices.