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Träfflista för sökning "WFRF:(Sarajlic M.) srt2:(2013)"

Sökning: WFRF:(Sarajlic M.) > (2013)

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1.
  • Jaksic, Z., et al. (författare)
  • Gradient-index infrared metamaterials based on metal-dielectric submicrometer pillar arrays
  • 2013
  • Ingår i: 2013 11th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services, TELSIKS 2013. - : IEEE. - 9781479909025 ; , s. 21-24
  • Konferensbidrag (refereegranskat)abstract
    • This paper presents the design and microfabrication of a two-dimensional metal-dielectric metamaterial structure based on an array of pillars with submicrometer diameters and heights. The diameters of pillars periodically vary along one axis in a sawtooth fashion and are constant along the other. The electromagnetic field distribution within this graded metamaterial was considered utilizing an accurate analytical approach. The pillar arrays were fabricated in photoresist and subsequently covered with a sputter-deposited aluminum film. Structures were defined by direct laser writing in photoresist film. Controlled overexposure has been applied in order to make pillar features smaller than the nominal resolution of the equipment. The structures were characterized by optical and atomic force microscopy and by angle-dependent Fourier Transform infrared spectroscopy. The produced graded frequency-selective surfaces may be used e.g. in sensing.
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2.
  • Jakšić, Z., et al. (författare)
  • Two-dimensional gradient-index metamaterial with sawtooth profile
  • 2013
  • Ingår i: Microwave Review. - 1450-5835. ; 19:2, s. 96-101
  • Tidskriftsartikel (refereegranskat)abstract
    • We investigate theoretically and experimentally a binary metal-dielectric metamaterial with a sawtooth profile. The structure consists of a two-dimensional array of pillars with submicrometer diameters. The pillar diameters linearly vary along one axis and are constant along the other. This furnishes a serrated spatial profile of effective refractive index along a single axis. We first present a set of analytical solutions defining the electromagnetic fields in such a structure. Further we give the results of our experimental fabrication of gradient metamaterial with a sawtooth spatial profile. The basic material for pillars was photoresist. Their geometry was defined using direct laser writing. Resist was overexposed in controlled manner in order to obtain pillars with diameters below the nominal resolution of the laser writer. The microfabricated pillars were coated by a sputter-deposited aluminum film. For characterization we utilized optical and atomic force microscopy and angledependent Fourier Transform infrared spectroscopy. We envision the applicability of our graded metasurfaces in transformation optics.
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  • Resultat 1-2 av 2
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konferensbidrag (1)
tidskriftsartikel (1)
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refereegranskat (2)
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Dalarsson, Mariana (2)
Lazic, Z (2)
Sarajlic, M. (2)
Jaksic, Z. (2)
Randjelovic, D. (2)
Radulovic, K. (2)
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Tanaskovic, D. (2)
Dalarsson, Nils (1)
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Kungliga Tekniska Högskolan (2)
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