Abstract
Excitation of plasmons in a metal nanoparticle leads to localization of electromagnetic fields within the particle, which is expected to result in strong optical nonlinearities. We study ultrafast nonlinearities in optical scattering from single gold nanorods under resonant excitation at the plasmon frequency, and observe changes of as much as 20% in the scattering cross section over the 20-fs laser pulse duration. Unexpectedly, the magnitude of the ultrafast nonlinearity is the same as that due to heating of conduction electrons in the metal.
Original language | English |
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Article number | 59270Z |
Pages (from-to) | 1-11 |
Number of pages | 11 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 5927 |
DOIs | |
Publication status | Published - 2005 |
Externally published | Yes |
Event | Plasmonics: Metallic Nanostructures and Their Optical Properties III - San Diego, CA, United States Duration: 2005 Jul 31 → 2005 Aug 3 |
Keywords
- Nanoparticles
- Nonlinear optics
- Plasmons
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering