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Design of mid-infrared ultra-wideband metallic absorber based on circuit theory

Arik, K ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1016/j.optcom.2016.07.014
  3. Publisher: Elsevier B.V , 2016
  4. Abstract:
  5. An ultra-broadband absorber of light is proposed by using periodic array of ultra-thin metallic ribbons on top of a lossless quarter-wavelength dielectric spacer placed on a metallic reflector. We propose a fully analytical circuit model for the structure, and then the absorber is duly designed based on the impedance matching concept. As a result, normalized bandwidth of 99.5% is realized by the proposed absorbing structure in mid-infrared regime. Performing a numerical optimization algorithm, we could also reach to normalized bandwidth of 103%
  6. Keywords:
  7. Broadband absorber ; Circuit model ; Subwavelength structures ; Bandwidth ; Circuit simulation ; Infrared devices ; Optimization ; Reconfigurable hardware ; Ultra-wideband (UWB) ; Absorbing structure ; Analytical circuit models ; Broadband absorbers ; Circuit modeling ; Metallic reflectors ; Numerical optimization algorithms ; Plasmonics ; Circuit theory
  8. Source: Optics Communications ; Volume 381 , 2016 , Pages 309-313 ; 00304018 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0030401816306046?via%3Dihub