Light absorption and field enhancement in two-dimensional arrays of closely spaced silver nanoparticles

Centeno, A. , Xie, F. and Alford, N. (2011) Light absorption and field enhancement in two-dimensional arrays of closely spaced silver nanoparticles. Journal of the Optical Society of America B: Optical Physics, 28(2), pp. 325-330. (doi: 10.1364/JOSAB.28.000325)

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Abstract

The absorption of visible light by silver nanoparticles in two-dimensional arrays is investigated using a finite difference time domain algorithm. The results of the calculations show that for all shapes considered, spheres and triangular and rectangular prisms, there is reduced absorption when the particles become more densely packed within the array. The effect is seen to be more pronounced for rectangular and triangular prisms. Investigation of the electromagnetic field very close to the tip of the prism shows that the intensity is very sensitive to the separation between the nanoparticles, with the electric field increasing significantly as the spacing between the particles reduces.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Centeno, Dr Anthony
Authors: Centeno, A., Xie, F., and Alford, N.
College/School:College of Science and Engineering > School of Engineering
Journal Name:Journal of the Optical Society of America B: Optical Physics
Publisher:Optical Society of America
ISSN:0740-3224
ISSN (Online):1520-8540

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