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 mu m) 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. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JNP.6.061601]

Optical response of multilayer thermochromic VO2-based structures / LI VOTI, Roberto; Larciprete, Maria Cristina; Leahu, Grigore; Sibilia, Concetta; Bertolotti, Mario. - In: JOURNAL OF NANOPHOTONICS. - ISSN 1934-2608. - ELETTRONICO. - 6:1(2012), pp. 061601-1-061601-5. [10.1117/1.jnp.6.061601]

Optical response of multilayer thermochromic VO2-based structures

LI VOTI, Roberto;LARCIPRETE, Maria Cristina;LEAHU, GRIGORE;SIBILIA, Concetta;BERTOLOTTI, Mario
2012

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 mu m) 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. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JNP.6.061601]
2012
thermochromic materials; transparent metals; optical filters; infrared emissivity; infrared signature
01 Pubblicazione su rivista::01a Articolo in rivista
Optical response of multilayer thermochromic VO2-based structures / LI VOTI, Roberto; Larciprete, Maria Cristina; Leahu, Grigore; Sibilia, Concetta; Bertolotti, Mario. - In: JOURNAL OF NANOPHOTONICS. - ISSN 1934-2608. - ELETTRONICO. - 6:1(2012), pp. 061601-1-061601-5. [10.1117/1.jnp.6.061601]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/446046
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