Surface and bulk contributions to the second-order nonlinear optical response of a gold film

Fu Xiang Wang, Francisco, J. Rodríguez, Willem M. Albers, Risto Ahorinta, J.E. Sipe, Martti Kauranen

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We use two-beam second-harmonic generation to separate the surface (electric dipole origin) and bulk (magnetic dipole and electric quadrupole origin) contributions to the second-order nonlinear optical response of an isotropic gold film. The bulk response is unambiguously observed and explained by momentum damping of electrons in a free-electron model. Although bulk effects could be enhanced by inhomogeneous local fields in metal nanostructures and have been used to model second-harmonic generation from metamaterials [Y. Zeng et al., Phys. Rev. B 79, 235109 (2009)], we find that surface effects dominate the nonlinearity. Our quantitative results for the surface and bulk parameters set the baseline for future descriptions of the second-order response of nanostructured metals.
Original languageEnglish
Article number233402
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume80
Issue number23
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fingerprint

gold
harmonic generations
magnetic dipoles
metals
electric dipoles
free electrons
quadrupoles
damping
nonlinearity
momentum
electrons

Keywords

  • gold
  • metallic thin films
  • metamaterials
  • nanostructured materials
  • nonlinear optics
  • optical harmonic generation
  • optical materials

Cite this

Wang, Fu Xiang ; Rodríguez, Francisco, J. ; Albers, Willem M. ; Ahorinta, Risto ; Sipe, J.E. ; Kauranen, Martti. / Surface and bulk contributions to the second-order nonlinear optical response of a gold film. In: Physical Review B: Condensed Matter and Materials Physics. 2009 ; Vol. 80, No. 23.
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Surface and bulk contributions to the second-order nonlinear optical response of a gold film. / Wang, Fu Xiang; Rodríguez, Francisco, J.; Albers, Willem M.; Ahorinta, Risto; Sipe, J.E.; Kauranen, Martti.

In: Physical Review B: Condensed Matter and Materials Physics, Vol. 80, No. 23, 233402, 2009.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Surface and bulk contributions to the second-order nonlinear optical response of a gold film

AU - Wang, Fu Xiang

AU - Rodríguez, Francisco, J.

AU - Albers, Willem M.

AU - Ahorinta, Risto

AU - Sipe, J.E.

AU - Kauranen, Martti

PY - 2009

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AB - We use two-beam second-harmonic generation to separate the surface (electric dipole origin) and bulk (magnetic dipole and electric quadrupole origin) contributions to the second-order nonlinear optical response of an isotropic gold film. The bulk response is unambiguously observed and explained by momentum damping of electrons in a free-electron model. Although bulk effects could be enhanced by inhomogeneous local fields in metal nanostructures and have been used to model second-harmonic generation from metamaterials [Y. Zeng et al., Phys. Rev. B 79, 235109 (2009)], we find that surface effects dominate the nonlinearity. Our quantitative results for the surface and bulk parameters set the baseline for future descriptions of the second-order response of nanostructured metals.

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KW - metallic thin films

KW - metamaterials

KW - nanostructured materials

KW - nonlinear optics

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