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Calculated photonic structures for infrared emittance control
Uppsala Univ, Div Solid State Phys, Angstrom Lab, SE-75121 Uppsala, Sweden Swedish Dewf Res Agcy, Dept Funct Mat, SE-58111 Linkoping, Sweden.
Uppsala Univ, Div Solid State Phys, Angstrom Lab, SE-75121 Uppsala, Sweden Swedish Dewf Res Agcy, Dept Funct Mat, SE-58111 Linkoping, Sweden.
2002 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 41, no 16, 3327-3331 p.Article in journal (Refereed) Published
Abstract [en]

Using an available program package based on the transfer-matrix method, we calculated the photonic band structure for two different structures: a quasi-three-dimensional crystal of square air rods in a high-index matrix and an opal structure of high-index spheres in a matrix of low index, epsilon = 1.5. The high index used is representative of gallium arsenide in the thermal infrared range. The geometric parameters of the rod dimension, sphere radius, and lattice constants were chosen to give total reflectance for normal incidence, i.e., minimum thermal emittance, in either one of the two infrared atmospheric windows. For these four photonic crystals, the bulk reflectance spectra and the wavelength-averaged thermal emittance as a function of crystal thickness were calculated. The results reveal that potentially useful thermal signature suppression is obtained for crystals as thin as 20-50 mum, i.e., comparable with that of a paint layer. (C) 2002 Optical Society of America.

Place, publisher, year, edition, pages
2002. Vol. 41, no 16, 3327-3331 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-48904OAI: oai:DiVA.org:liu-48904DiVA: diva2:269800
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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