Optical response of multilayer thermochromic VO2-based structures

Roberto Li Voti; Maria C. Larciprete; Grigore Leahu; Concita Sibilia; Mario Bertolotti

doi:10.1117/1.JNP.6.061601

7 August 2012 Optical response of multilayer thermochromic VO₂-based structures

Roberto Li Voti, Maria C. Larciprete, Grigore Leahu, Concita Sibilia, Mario Bertolotti

Author Affiliations +

Journal of Nanophotonics, Vol. 6, Issue 1, 061601 (August 2012). https://doi.org/10.1117/1.JNP.6.061601

Abstract

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.

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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). https://doi.org/10.1117/1.JNP.6.061601

Published: 7 August 2012

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