title: Ultrabroadband photonic structures to achieve high-performance daytime radiative cooling.
abstract: If properly designed, terrestrial structures can passively cool themselves through radiative emission of heat to outer space. For the first time, we present a metal-dielectric photonic structure capable of radiative cooling in daytime outdoor conditions. The structure behaves as a broadband mirror for solar light, while simultaneously emitting strongly in the mid-IR within the atmospheric transparency window, achieving a net cooling power in excess of 100 W/m(2) at ambient temperature. This cooling persists in the presence of significant convective/conductive heat exchange and nonideal atmospheric conditions.
authors: Department of Applied Physics, Stanford University, Stanford, California 94305, United States. edenr@stanford.edu
authors: Eden
authors: E
authors: Rephaeli
authors: Aaswath
authors: A
authors: Raman
authors: Shanhui
authors: S
authors: Fan
mesh_terms: D001272:Atmosphere; D006358:Hot Temperature; D008670:Metals / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D017785:Photons; D013472:Sunlight
chemical_list: D008670:Metals