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Optical Properties of Metal Nanoparticles with Arbitrary Shapes

2003; American Chemical Society; Volume: 107; Issue: 26 Linguagem: Inglês

10.1021/jp0274076

1520-6106

Iván O. Sosa, Cecilia Noguez, Rubén G. Barrera,

Nonlinear Optical Materials Studies

We have studied the optical properties of metallic nanoparticles with arbitrary shape. We performed theoretical calculations of the absorption, extinction and scattering efficiencies, which can be directly compared with experiments, using the Discrete Dipole Approximation (DDA). In this work, the main features in the optical spectra have been investigated depending of the geometry and size of the nanoparticles. The origin of the optical spectra are discussed in terms of the size, shape and material properties of each nanoparticle, showing that a nanoparticle can be distinguish by its optical signature.