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7 August 2012 Optical response of multilayer thermochromic VO2-based structures
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We considered the emissivity properties of VO2 thin films as a function of temperature through several simulations, considering different substrates and multilayer structures. Formulating the concept of emissivity tunability is introduced and we found that a large difference in emissivity, below and above the transition temperature, can be obtained which may be used for the design of medium-wave infrared (3 to 5 μm) filters. Specifically, we optimized a multilayer structure, to function as a low-emissivity filter, at high temperature for the reduction of infrared signature. The values of emissivity changes, found for a VO2/metal multilayer, are larger than the value of a single layer of VO2.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2012/$25.00 © 2012 SPIE
Roberto Li Voti, Maria C. Larciprete, Grigore Leahu, Concita Sibilia, and Mario Bertolotti "Optical response of multilayer thermochromic VO2-based structures," Journal of Nanophotonics 6(1), 061601 (7 August 2012).
Published: 7 August 2012

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