Special Section: Selected Papers from the 4th Mediterranean Conference on Nanophotonics

Optical response of multilayer thermochromic VO2-based structures

[+] Author Affiliations
Roberto Li Voti, Maria Cristina Larciprete, Grigore Leahu, Concita Sibilia, Mario Bertolotti

Sapienza Università di Roma, Department of Basic and Applied Science for Engineering, Via A. Scarpa 16, 00161 Roma, Italy

J. Nanophoton. 6(1), 061601 (Aug 07, 2012). doi:10.1117/1.JNP.6.061601
History: Received March 6, 2012; Revised May 8, 2012; Accepted May 10, 2012
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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.

Figures in this Article
© 2012 Society of Photo-Optical Instrumentation Engineers

Topics

Metals ; Multilayers

Citation

Roberto Li Voti ; Maria Cristina Larciprete ; Grigore Leahu ; Concita Sibilia and Mario Bertolotti
"Optical response of multilayer thermochromic VO2-based structures", J. Nanophoton. 6(1), 061601 (Aug 07, 2012). ; http://dx.doi.org/10.1117/1.JNP.6.061601


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