Surface plasmon resonance spectroscopy on rotated sub-micrometer polymer gratings generated by UV-laser based two-beam interference

M. Csete, G. Szekeres, Cs Vass, N. Maghelli, K. Osvay, Zs Bor, M. Pietralla, O. Marti

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Two-beam interference method was applied to generate gratings having periods of 416 nm and 833 nm by the forth harmonic of a Nd:Yag laser on thin poly-carbonate films spin-coated onto silver layer-covered substrates. The dependence of the modulation depth on the fluence and number of laser pulses was investigated by atomic force microscopy. A secondary pattern appeared on very thin polymer layers thanks to the "p" polarized laser beam illumination induced self-organized processes. The conditions of the emergence of grating-coupling caused additional plasmon resonance peak were determined for the sub-micrometer periodic polymer gratings. Surface plasmon resonance measurements were performed in attenuated total reflection arrangement to determine the effect of the angle between the plasmon propagation direction and the polymer groves on the grating-coupling. The effect of the modulation depth on the grating-coupling caused additional resonance minimum was also analyzed. We found coupling phenomena according to our calculations, the differences between the measured and theoretically predicted resonance curves were explained by the scattering on the complex surface structure.

Original languageEnglish
Pages (from-to)4773-4780
Number of pages8
JournalApplied Surface Science
Volume252
Issue number13 SPEC. ISS.
DOIs
Publication statusPublished - Apr 30 2006

Keywords

  • Grating-coupling
  • Sub-micrometer polymer gratings
  • Surface plasmons

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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