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In situ characterization of one-dimensional plasmonic Ag nanocluster arrays

Verre, R. and Fleischer, K. and Sofin, R. G. S. and McAlinden, N. and McGilp, J. F. and Shvets, I. V. (2011) In situ characterization of one-dimensional plasmonic Ag nanocluster arrays. Physical Review B, 83 (12). -. ISSN 1098-0121

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Abstract

One-dimensional Ag nanoparticle arrays have been grown on step-bunched vicinal Al2O3 in ultrahigh vacuum using deposition at a glancing angle. The structures grown showed a strong optical anisotropy in the visible region of the spectrum. The optical anisotropy was measured in situ using reflection anisotropy spectroscopy. Relevant optical properties were determined as a function of deposition angle and Ag thickness. A simple phenomenological model was developed to reproduce the features seen in the spectra. With this model it was possible to use the inhomogeneous broadening as a guide to the nanoparticle dispersion.