Thin Perfect Absorbers Based On Metamaterials For Optical Frequencies

In this work a bidimensional array of particles is approached like a system of dipoles characterized by their electric and magnetic polarizabilities. The interaction between particles has been taken into account by adding contribution of every dipole at the position of the central dipole. This array was modeled later as a surface which supports effective electric and magnetic surface currents. From these currents, the boundary conditions for perfect absorption were established. This model was applied onto an array of coated nanospheres, whose scattering is described by the Mie theory, obtaining values of absorption up to 99%.