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Journal of Nanophotonics

Optical response of multilayer thermochromic VO2-based structures
Author(s): Roberto Li Voti; Maria C. Larciprete; Grigore Leahu; Concita Sibilia; Mario Bertolotti
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Paper 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.

Paper Details

Date Published: 7 August 2012
PDF: 6 pages
J. Nanophoton. 6(1) 061601 doi: 10.1117/1.JNP.6.061601
Published in: Journal of Nanophotonics Volume 6, Issue 1
Show Author Affiliations
Roberto Li Voti, Univ. degli Studi di Roma La Sapienza (Italy)
Maria C. Larciprete, Univ. degli Studi di Roma La Sapienza (Italy)
Grigore Leahu, Univ. degli Studi di Roma La Sapienza (Italy)
Concita Sibilia, Univ. degli Studi di Roma La Sapienza (Italy)
Mario Bertolotti, Univ. degli Studi di Roma La Sapienza (Italy)

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