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Plasmonic response and transformation mechanism upon single laser exposure of metal discontinuous films

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2014

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Rodriguez, Carlos E.
Peláez, Ramon J.
Alfonso, Carmen N.
Jimenez-Rey, David
Climent-Font, Aurelio

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https://doi.org/10.1016/j.apsusc.2013.10.104
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Applied Surface Science. 2014, 302, pp. 32-36. eISSN 0169-4332. Available under: doi: 10.1016/j.apsusc.2013.10.104

Zusammenfassung

Ag and Au discontinuous films were exposed to single nanosecond pulses of a homogenized beam of an excimer laser operating at 193 nm. For low fluences, the films convert into big, almost spherical and isolated nanoparticles (NPs) due to laser-induced dewetting. Their optical response exhibits a sharp surface plasmon resonance (SPR) consistent with that of spherical and non-interacting NPs. For higher fluences, the formation of many small NPs and almost no big NPs is observed instead. The SPR features change and the plasmonic response becomes influenced by multipolar interactions among neighbouring NPs. Low and high fluence regimes are respectively related to melting and boiling threshold of the metal, and additionally, craters appear in the latter regime.

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530 Physik

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Laser irradiation, Silver, Gold, Nanoparticles, Plasmons, Interactions

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ISO 690RODRIGUEZ, Carlos E., Ramon J. PELÁEZ, Carmen N. ALFONSO, Stephen RIEDEL, Paul LEIDERER, David JIMENEZ-REY, Aurelio CLIMENT-FONT, 2014. Plasmonic response and transformation mechanism upon single laser exposure of metal discontinuous films. In: Applied Surface Science. 2014, 302, pp. 32-36. eISSN 0169-4332. Available under: doi: 10.1016/j.apsusc.2013.10.104
BibTex
@article{Rodriguez2014Plasm-29994,
  year={2014},
  doi={10.1016/j.apsusc.2013.10.104},
  title={Plasmonic response and transformation mechanism upon single laser exposure of metal discontinuous films},
  volume={302},
  journal={Applied Surface Science},
  pages={32--36},
  author={Rodriguez, Carlos E. and Peláez, Ramon J. and Alfonso, Carmen N. and Riedel, Stephen and Leiderer, Paul and Jimenez-Rey, David and Climent-Font, Aurelio}
}
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