cda-package: cda

Description

Coupled dipole approximation in electromagnetic scattering

Arguments

Details

The cda package implements the coupled-dipole approximation for electromagnetic scattering by sparse collections of subwavelength particles, with a particular focus on plasmonic nanoparticles in the visible regime. The interaction matrix, and the solution of the linear system of coupled-dipole equations are executed in C++ code for speed; convenient wrapper functions are provided at the R level to generate the particle clusters, calculate the extinction, scattering, and absorption of light by particles with linearly and circularly polarised light. Functions are also provided to calculate orientation-averaged circular dichroism, and display clusters of nanoparticles in three dimensions using OpenGL or povray.

References

Draine BT. The discrete-dipole approximation and its application to interstellar graphite grains. Astrophysical Journal. 1988.

Schatz GC, Duyne RP. Discrete dipole approximation for calculating extinction and Raman intensities for small particles with arbitrary shapes. Journal of Chemical Physics. 1995.

Gunnarsson L, Zou S, Schatz GC, et al. Confined plasmons in nanofabricated single silver particle pairs: Experimental observations of strong interparticle interactions. Journal of Physical Chemistry B. 2005.

## Any one of the following references may (should) be used to cite and acknowledge this package.

A. Guerrero-Martinez, B. Auguie, J.L. Alonso-Gomez, Z. Dzolic, S. Gomez-Grana, M. Zinic, M.M. Cid, L.M. Liz-Marzan. Intense Optical Activity from three-Dimensional Chiral Ordering of Plasmonic Nanoantennas. Angew. Chem. Int. Ed.50 (2011)

B. Auguie, J.L. Alonso-Gomez, A. Guerrero-Martinez, L.M. Liz-Marzan. Fingers crossed: circular dichroism with a dimer of plasmonic nanorods. J. Phys. Chem. Lett. 2, (2011)

B. Auguie, W.L. Barnes. Diffractive coupling in gold nanoparticle arrays and the effect of disorder. Optics Letters (2009)

B. Auguie, W.L. Barnes. Collective resonances in gold nanoparticle arrays. Physical Review Letters (2008)