Ricerc@Sapienza

We study wide-angle and broadband perfect absorbers with compact multilayer
structures made of a sequence of ITO and TiN layers deposited onto a silver thick
layer. An optimization procedure is introduced for searching the optimal thicknesses
of the layers so as to design a perfect broadband absorber from 400nm to 750 nm, for a
wide range of angles of incidence from 0◦ to 50◦, for both polarizations and with a low
emissivity in the mid-infrared. We eventually compare the performances of several
optimal structures that can be very promising for solar thermal energy harvesting and
collectors.