DOI: 10.1615/RAD-16
ISBN Print: 978-1-56700-458-8
ISSN Online: 2642-5629
ISSN Flash Drive: 2642-5661
VANADIUM DIOXIDE BASED FABRY-PEROT EMITTER FOR DYNAMIC RADIATIVE COOLING APPLICATIONS
SINOPSIS
An asymmetric Fabry-Perot emitter is proposed with a lossless dielectric spacer sandwiched between a vanadium dioxide (VO2) thin film and an opaque aluminum substrate. Switchable mid-infrared emittance has been achieved due to the insulator-to-metal transition of VO2. When VO2 is dielectric below 341 K, the structure is highly reflective, whereas a Fabry-Perot resonance cavity is formed with high broadband emissivity at 10 μm when VO2 becomes metallic above 345 K. The radiative properties are calculated via a uniaxial transfer matrix method and Bruggeman effective medium theory. This study will facilitate novel applications in building and spacecraft radiative cooling.