Publication Date:
2012-03-10
Description:
We describe a novel ion-implantation method for fabricating a dichroic nanoparticle film by controlling the nucleation and growth of silver nanoparticles in fused silica. We first implant Sc and O ions into the silica substrate to create a high-index layer and modify the short- and intermediate-range order; this dual-implantation technique defines a sharper interface between the silica substrate and the nanoparticle layer. By modifying the short- and intermediate-range order in a thin layer of the silica matrix, Ag ions that are subsequently implanted are subject to altered diffusion and nucleation dynamics, yielding a bilayer structure comprising spatially separated regions of smaller and larger Ag nanoparticles. Depending on the implanted dose of Sc, the peak resonant wavelength in reflectivity can shift as much as 100 nm between front-side (implanted face) and back-side (non-implanted face) illumination. Implications for the optimization of bidirectional optical filters and optical cavities are discussed and compared to calculations of scattering efficiency based on Mie theory. Content Type Journal Article Pages 1-8 DOI 10.1007/s00339-012-6827-4 Authors R. H. Magruder, Department of Chemistry and Physics, Belmont University, Nashville, TN 37212, USA S. Robinson, Department of Chemistry and Physics, Belmont University, Nashville, TN 37212, USA C. Smith, Department of Chemistry and Physics, Belmont University, Nashville, TN 37212, USA A. Meldrum, Department of Physics, University of Alberta, Edmonton, AB T6G 2J1, Canada R. F. Haglund, Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA Journal Applied Physics A: Materials Science & Processing Online ISSN 1432-0630 Print ISSN 0947-8396
Print ISSN:
0947-8396
Electronic ISSN:
1432-0630
Topics:
Technology
,
Physics
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