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Plasmon resonance optical tuning based on photosensitive composite structures

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

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Abstract

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.

© 2014 Optical Society of America

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