Abstract
AbstractControlling directional thermal emission to match the ultra‐broadband atmospheric window is a long‐standing scientific challenge. Here, a strategy is introduced for achieving ultra‐broadband directional thermal emission matching the atmospheric window by combining Fabry–Perot resonances and the Brewster effect. The planar system, comprising a thin dielectric film (Ge) on a radiative substrate, exhibits high p‐polarized emissivity (> 0.9) at specific directions (76°–84°) covering the entire atmospheric window (3–5 and 8–14 µm) and high omnidirectional emission (> 0.7) in the non‐atmospheric window (5–8 µm) for simultaneous efficient radiative cooling. Moreover, it can integrate independent dual‐band (visible–IR) information encryption and the infrared information anti‐snooping function. The approach offers unique insights into controlling thermal emission using planar films, with broad implications in camouflage, thermal management, and encryption.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
