Plasmon resonance optical tuning based on photosensitive composite structures

Giovanni Gilardi, Sanshui Xiao, N. Asger Mortensen, Antonio d'Alessandro, Romeo Beccherelli

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This paper reports a numerical investigation of a periodic metallic structure sandwiched between two quartz plates. The volume comprised between the quartz plates and the metallic structure is infiltrated by a mixture of azo-dye-doped liquid crystal. The exposure to a low power visible light beam modifies the azo dye molecular configuration, thus allowing the wavelength shift of the resonance of the system. The wavelength shift depends on the geometry of the periodic structure and it also depends on the intensity of the visible light beam.
Original languageEnglish
JournalOptical Society of America. Journal B: Optical Physics
Issue number2
Pages (from-to)360-365
Publication statusPublished - 2014

Bibliographical note

This paper was published in JOSA B and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


  • Liquid crystals
  • Liquid-crystal devices
  • Surface plasmons


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