TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Boundary element method for surface nonlinear optics of nanoparticles

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut23386-23399
JulkaisuOptics Express
Vuosikerta19
Numero23
DOI - pysyväislinkit
TilaJulkaistu - 2011
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

We present the frequency-domain boundary element formulation for solving surface second-harmonic generation from nanoparticles of virtually arbitrary shape and material. We use the Rao-Wilton-Glisson basis functions and Galerkin’s testing, which leads to very accurate solutions for both near and far fields. This is verified by a comparison to a solution obtained via multipole expansion for the case of a spherical particle. The frequency-domain formulation allows the use of experimentally measured linear and nonlinear material parameters or the use of parameters obtained using ab-initio principles. As an example, the method is applied to a non-centrosymmetric L-shaped gold nanoparticle to illustrate the formation of surface nonlinear polarization and the second-harmonic radiation properties of the particle. This method provides a theoretically well-founded approach for modelling nonlinear optical phenomena in nanoparticles.

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