In this paper we design and simulate VO2/metal multilayers to obtain a large tunability of the thermal emissivity of IR filters in the typical MWIR window of many infrared cameras. The multilayer structure is optimized to realise a low-emissivity filter at high temperatures useful for military purposes. The values of tunability found for VO2/metal multilayers are larger than the value for a single thick layer of VO2. Innovative SiO2/VO2 synthetic opals are also investigated to enhance the optical tunability by combining the properties of a 3D periodic structure and the specific optical properties of vanadium dioxide. ©Società Italiana di Fisica.
Optimization of thermochromic VO2-based structures with tunable thermal emissivity / LI VOTI, Roberto; Larciprete, Maria Cristina; Leahu, Grigore; Bertolotti, Mario; Sibilia, Concetta. - In: IL NUOVO CIMENTO C. - ISSN 2037-4909. - STAMPA. - 36:2(2013), pp. 23-33. [10.1393/ncc/i2013-11504-8]
Optimization of thermochromic VO2-based structures with tunable thermal emissivity
LI VOTI, Roberto;LARCIPRETE, Maria Cristina;LEAHU, GRIGORE;BERTOLOTTI, Mario;SIBILIA, Concetta
2013
Abstract
In this paper we design and simulate VO2/metal multilayers to obtain a large tunability of the thermal emissivity of IR filters in the typical MWIR window of many infrared cameras. The multilayer structure is optimized to realise a low-emissivity filter at high temperatures useful for military purposes. The values of tunability found for VO2/metal multilayers are larger than the value for a single thick layer of VO2. Innovative SiO2/VO2 synthetic opals are also investigated to enhance the optical tunability by combining the properties of a 3D periodic structure and the specific optical properties of vanadium dioxide. ©Società Italiana di Fisica.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
