Vanadium-dioxide microstructures with designable temperature-dependent thermal emission

• DOI: 10.1364/ol.414705
• Publication Date: 2021-02-18T20:30:25Z
• Authors: Romil Audhkhasi; Michelle L. Povin...
• Keywords: 02 engineering and technology; 0210 nano-technology

We propose gold-vanadium dioxide microstructures for which the difference in thermally radiated power between low and high temperature states can be tuned via structural design. start by incorporating <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi mathvariant="normal">V</mml:mi> mathvariant="normal">O</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> </mml:math> a gold-dielectric-gold waveguide to achieve temperature-dependent mode effective index. show that cavity formed this structure has fundamental resonance wavelength shifts with temperature. calculate thermal from at temperatures above below phase transition of wavelengths 8 14 µm. made positive, negative, or zero simply adjusting length. Finally, we use our design emissive metasurfaces spatial emission patterns inverted Our emitters could serve as building blocks realization enabling complex radiation control.