Metallic Nanoparticles for Infrared-Blocking Windows

The optical properties of metallic nanoparticles are widely studied in nanooptics due to the multiple applications that can be developed. In this work we explore, by means of numerical simulations, the optical properties of metallic nanoparticles in order to attenuate the infrared radiation in a window. The simulations were carried out by solving the full Maxwell equations using the boundary element method (BEM). Gold, silver and aluminum nanorods were simulated, as well as silver nanotriangles. The simulation results and numerical calculations show a high transmittance in the visible range and a strong attenuation at wavelengths between 700 nm and 1575 nm (which corresponds to most of the infrared radiation coming from the sun) for the case of gold and silver nanorods and for silver nanotriangles. Our results provide useful details for the design of infrared-blocking windows.