Strong broadband scattering of anisotropic plasmonic nanoparticles synthesized by controllable growth: effects of lumpy morphology

Strong scattering intensities in a broadband wavelength range from metallic nanoparticles are essential for diverse photonics applications. Conventional ways of controlling particle scattering are via the control of the size, shape and embedding dielectric environment. In this paper we demonstrate t...

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Bibliographic Details
Published in:Optical materials express 2013-01, Vol.3 (1), p.27-34
Main Authors: Chen, Xi, Jia, Baohua, Saha, Jhantu Kumar, Stokes, Nicholas, Qiao, Qi, Wang, Yongqian, Shi, Zhengrong, Gu, Min
Format: Article
Language:English
Subjects:
Anisotropy
Broadband
Nanoparticles
Plasmonics
Scattering
Surface roughness
Topography
Wavelengths
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Summary:Strong scattering intensities in a broadband wavelength range from metallic nanoparticles are essential for diverse photonics applications. Conventional ways of controlling particle scattering are via the control of the size, shape and embedding dielectric environment. In this paper we demonstrate that tailoring the particle surface roughness is another effective way of controlling particle scattering. Roughly surfaced lumpy silver nanoparticles, which have anisotropic surface topography, are realized by a controlled shape- and size-selective wet chemical method. Through the systematic comparison with the smoothly surfaced nanoparticles of the same size and size distribution, we verify both experimentally and theoretically that the lumpy nanoparticles produce large-angle broadband plasmonic scattering due to their unique surface anisotropic structure.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.3.000027