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Tuning Dichroic Plasmon Resonance Modes of Gold Nanoparticles in Optical Thin Films
Author(s) -
GonzalezGarcía Lola,
ParraBarranco Julian,
SanchezValencia Juan Ramón,
Ferrer Javier,
GarciaGutierrez MariCruz,
Barranco Angel,
GonzalezElipe Agustín R.
Publication year - 2013
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201201900
Subject(s) - materials science , dichroic glass , surface plasmon resonance , optics , colloidal gold , plasmon , dichroism , nanoparticle , thin film , scattering , polarization (electrochemistry) , anisotropy , optoelectronics , light scattering , nanotechnology , chemistry , physics
Abstract A simple method is presented to tune the gold surface plasmon resonance (SPR) modes by growing anisotropic nanoparticles into transparent SiO 2 thin films prepared by glancing angle deposition. In this type of composite film, the anisotropy of the gold nanoparticles, proved by gracing incidence small angle X‐ray scattering, is determined by the tilted nanocolumnar structure of the SiO 2 host and yields a strong film dichroism evidenced by a change from an intense colored to a nearly transparent aspect depending on light polarization and/or sample orientation. The formation in these films of lithographic non‐dichroic SPR patterns by nanosecond laser writing demonstrates the potentialities of this procedure to develop novel optical encryption or anti‐counterfeiting structures either at micrometer‐ or macroscales.