Open AccessPolarization insensitive infrared absorbing behaviour of one-dimensional multilayer stack: a fractal approach
Author(s) -
Maria Cristina Larciprete,
Marco Centini,
R. Li Voti,
M. Bertolotti,
C. Sibilia
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.0a1547
Subject(s) - optics , infrared , materials science , polarization (electrochemistry) , fractal , emissivity , thermal emittance , transmittance , wavelength , stack (abstract data type) , refractive index , optoelectronics , physics , beam (structure) , mathematical analysis , chemistry , mathematics , computer science , programming language
The control and tailoring of infrared absorbance/emittance is a crucial task for all those applications involving thermal radiation management and detection. We theoretically investigated the peculiar absorbing/emitting behaviour of pre-fractal Cantor multilayers, in order to design a polarization-insensitive multilayer stack absorbing over a wide angular lobe in the mid wavelength infrared range (8-10 μm). Using transfer matrix method, we explored the spectral properties arising from both the material and the geometrical dispersion. We considered several combinations of the constituent materials: SiO2 was combined with TiO2 and Si, respectively.