:::::::You are in Global Research Journals! Welcome::::::GARJETI>William and Alan : Anti-frost and energy-saving transparent glass widows manipulated through solar-absorbing metamaterial coatings

In this paper, possible approaches will be explored for designing transparent glass windows with anti-frost/anti-fog and energy-saving capabilities by coating nanostructure metamaterials on the widow’s outside surface. The metal-dielectric-metal nano-scale metamaterial structures with periodic metal-dielectric interfaces, when shined with light, acquire surface plasmons thus trapping light at subwavelength scales. When these metamaterials are coated on the outside of a glass window, they may lead to efficient solar radiation absorption, which can be used for anti-frost/anti-fog and energy-saving windows of transportation vehicles and modern buildings. The total thickness of the so-called metamaterial perfect solar absorber is a few tens of nanometer and its absorption band is broad, tunable and insensitive to the angle of incidence. This paper will present a concept to use the matermaterial coating on the window glass to absorb solar spectrum (λ > 0.7 μm) for anti-frost/anti-fog and energy-saving in the winter, meanwhile almost without lowering the luminous transmittance. In the summer, for a rotatable window, its opposite side with the perfect mirror function can be turn to face the sunlight to reflect the sunlight away. By adjusting bottom coating structure, perfect or non-perfect mirror can be formed for natural solar reflection or transmittance.

Keywords: Metamaterial coating, transparent glass window, anti-frost, anti-fog, energy-saving, solar absorber, heat transfer, transportation vehicle, building