Klemm, Philippe and Haug, Tobias and Bange, Sebastian and Lupton, John M. (2014) Time-Domain Interferometry of Surface Plasmons at Nonlinear Continuum Hot Spots in Films of Silver Nanoparticles. PHYSICAL REVIEW LETTERS, 113 (26): 266805. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
Nonlinear continuum generation from diffraction-limited hot spots in rough silver films exhibits striking narrow-band intensity resonances in excitation wavelength. Time-domain Fourier spectroscopy uncovers how these resonances arise due to the formation of a "plasmon staircase", a discreteness in the fundamental oscillation of the plasmon excitations responsible for generating the white-light continuum. Whereas multiple scattering from discrete antennas can be invoked to explain hot spot formation in random assemblies of isolated particles, hot spots in films of fused nanoparticles are excited by interfering propagating surface plasmons, launched by scattering from individual nanoparticle antennas. For closed films, discrete propagating plasmons interact coherently over distances of tens of microns to pump the hot spot.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ENHANCED RAMAN-SCATTERING; NOBLE-METALS; LIGHT; GENERATION; INTERFERENCE; MICROSCOPY; EXCITATION; DYNAMICS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Aug 2019 08:04 |
| Last Modified: | 05 Aug 2019 08:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9025 |
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