Special Section on Nanostructures Honoring Craig F. Bohren

Anisotropic properties of plasmonic nanoparticles: depolarized light scattering, dichroism, and birefringence

[+] Author Affiliations
Nikolai G. Khlebtsov

Russian Academy of Sciences, Institute of Biochemistry and Physiology of Plants and Microorganisms, 13 Prospekt Entuziastov, Saratov, 410049 Russia

J. Nanophoton. 4(1), 041587 (March 4, 2010). doi:10.1117/1.3370232
History: Received January 1, 2010; Revised February 27, 2010; Accepted March 1, 2010; March 4, 2010; Online March 04, 2010
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Abstract

The properties of gold and silver nanorods and nanodisks with geometric parameters typical of wet chemical fabrication protocols were investigated. With an extended-precision T-matrix code, a representative set of simulations for extinction, light scattering, and depolarization ratio spectra of randomly oriented particles and for dichroism and birefringence spectra of particles with an arbitrary predominant orientation with respect to incident linearly polarized light were obtained. The appearance of ultra-depolarized light scattering from random ensembles was elucidated by several 3D maps illustrating the dependence of the depolarization ratio on particular orientations of rods and disks. A simple dipole model sufficed to explain the orientation dependence of dichroism and birefringence and the unusual invariant spectral localization of the depolarization ratio maxima. Reasonable agreement was obtained with experimental data on depolarized light scattering from gold nanorods.

© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Nikolai G. Khlebtsov
"Anisotropic properties of plasmonic nanoparticles: depolarized light scattering, dichroism, and birefringence", J. Nanophoton. 4(1), 041587 (March 4, 2010). ; http://dx.doi.org/10.1117/1.3370232


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