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Towards the Reduction of Optical Losses in Transition Metal-Based Nanomaterials

Published online by Cambridge University Press:  11 March 2011

A. V. Gavrilenko ,
C. A. Gonder ,
D. J. Baker  and
V. I. Gavrilenko
A. V. Gavrilenko
Affiliation:
Center for Materials Research, Norfolk State University, 700 Park Ave, Norfolk, VA 23504
C. A. Gonder
Affiliation:
Center for Materials Research, Norfolk State University, 700 Park Ave, Norfolk, VA 23504
D. J. Baker
Affiliation:
Center for Materials Research, Norfolk State University, 700 Park Ave, Norfolk, VA 23504
V. I. Gavrilenko
Affiliation:
Center for Materials Research, Norfolk State University, 700 Park Ave, Norfolk, VA 23504
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Abstract

Equilibrium geometries and cohesion energies of Ag0.94Cd0.06, Ag0.94In0.06, Au0.94Cd0.06, and Au0.94In0.06 solid alloys have been studied from the first principles within the Density Functional Theory using ab initio pseudopotentials. Equilibrium geometries are obtained by total energy minimization method using the Local Density Approximation and Generalized Gradient Approximation methods. Optical functions are calculated within the independent particles picture. We report essentially different behavior of Cd and In impurity atoms in Au- and Ag-based alloys: the aggregated (or quasi aggregated) phases in In-containing alloys are expected in contrast to the alloys with Cd atom where homogeneous impurity distribution over the bulk should dominate. Study of optical spectra in Ag0.94Cd0.06 and Au0.94Cd0.06 alloys indicate that optical losses in visible and near ultraviolet spectral range remarkably increase at bigger Cd concentrations. In ultraviolet spectral region redistribution of optical oscillator strengths results in both increase and decrease of optical losses in selected spectral regions.

Keywords

absorptionalloystructural
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1294: Symposium M – Resonant Optical Antennas—Sensing and Shaping Materials , 2011 , mrsf10-1294-m05-31
Copyright
Copyright © Materials Research Society 2011

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References

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