Second-harmonic generation from coupled plasmon modes in a single dimer of gold nanospheres
| Autor: | Marcin Zielinski, Vincent Jacques, Y. De Wilde, Abdallah Slablab, Jean-François Roch, Dominique Chauvat, L. Le Xuan |
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| Rok vydání: | 2012 |
| Předmět: |
Light
Dimer Nanoparticle FOS: Physical sciences Physics::Optics Molecular physics law.invention chemistry.chemical_compound Optical microscope law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Materials Testing Scattering Radiation Surface plasmon resonance Plasmon Physics Condensed Matter - Mesoscale and Nanoscale Physics Second-harmonic generation Surface Plasmon Resonance Atomic and Molecular Physics and Optics chemistry Femtosecond Gold Dimerization Excitation Nanospheres |
| Zdroj: | Optics express. 20(1) |
| ISSN: | 1094-4087 |
| Popis: | We show that a dimer made of two gold nanospheres exhibits a remarkable efficiency for second-harmonic generation under femtosecond optical excitation. The detectable nonlinear emission for the given particle size and excitation wavelength arises when the two nanoparticles are as close as possible to contact, as in situ controlled and measured using the tip of an atomic force microscope. The excitation wavelength dependence of the second-harmonic signal supports a coupled plasmon resonance origin with radiation from the dimer gap. This nanometer-size light source might be used for high-resolution near-field optical microscopy. 6 pages, 5 figures |
| Databáze: | OpenAIRE |
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