期刊
ADVANCED FUNCTIONAL MATERIALS
卷 23, 期 13, 页码 1655-1663出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201201900
关键词
surface plasmon resonance; nanoparticles; thin films; lithography
类别
资金
- Junta de Andalucia [P09-CTS-5189, TEP5283, FQM-6900]
- Ministry of Economy and Competitiveness [CONSOLIDERCSD 2008-00023, MAT2010-21228, MAT2011-23455, MAT2010-18447]
- European Community [RII3-CT-2004-506008 (IASFS)]
A simple method is presented to tune the gold surface plasmon resonance (SPR) modes by growing anisotropic nanoparticles into transparent SiO2 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 SiO2 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.
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