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Proceedings Article

Selectively reflective transparent sheets

[+] Author Affiliations
Rémi Waché, Marian Florescu, Stephen J. Sweeney, Steven K. Clowes

Univ. of Surrey (United Kingdom)

Proc. SPIE 9546, Active Photonic Materials VII, 954607 (August 31, 2015); doi:10.1117/12.2188622
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From Conference Volume 9546

  • Active Photonic Materials VII
  • Ganapathi S. Subramania; Stavroula Foteinopoulou
  • San Diego, California, United States | August 09, 2015

abstract

We investigate the possibility to selectively reflect certain wavelengths while maintaining the optical properties on other spectral ranges. This is of particular interest for transparent materials, which for specific applications may require high reflectivity at pre-determined frequencies. Although there exist currently techniques such as coatings to produce selective reflection, this work focuses on new approaches for mass production of polyethylene sheets which incorporate either additives or surface patterning for selective reflection between 8 to 13 μ m. Typical additives used to produce a greenhouse effect in plastics include particles such as clays, silica or hydroxide materials. However, the absorption of thermal radiation is less efficient than the decrease of emissivity as it can be compared with the inclusion of Lambertian materials. Photonic band gap engineering by the periodic structuring of metamaterials is known in nature for producing the vivid bright colors in certain organisms via strong wavelength-selective reflection. Research to artificially engineer such structures has mainly focused on wavelengths in the visible and near infrared. However few studies to date have been carried out to investigate the properties of metastructures in the mid infrared range even though the patterning of microstructure is easier to achieve. We present preliminary results on the diffuse reflectivity using FDTD simulations and analyze the technical feasibility of these approaches. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Rémi Waché ; Marian Florescu ; Stephen J. Sweeney and Steven K. Clowes
" Selectively reflective transparent sheets ", Proc. SPIE 9546, Active Photonic Materials VII, 954607 (August 31, 2015); doi:10.1117/12.2188622; http://dx.doi.org/10.1117/12.2188622


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