Role of surface plasmon in second harmonic generation from gold nanorods

Christophe Hubert (1) , Laurent Billot (1) , Pierre-Michel Adam (1) , Renaud Bachelot (1) , Pascal Royer (1) , Johan Grand (2) , Denis Gindre (3, 4) , Kokou Dorkenoo (3, 4) , A. Fort (3, 4)

1 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique
2 ITODYS (UMR_7086) - Interfaces, Traitements, Organisation et Dynamique des Systèmes
3 IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg
4 Groupe d'Optique Non Linéaire et d'Optoélectronique, Institut de Physique et Chimie des Matériaux de Strasbourg

The role of surface plasmon in second harmonic generation from arrays of gold nanorod particles excited by femtosecond laser pulses is investigated as a function of incident light polarization and irradiation wavelength. In addition to photoluminescence, a peak of second harmonic is observed and is found to depend on the polarization and wavelength of the fundamental frequency laser beam. In particular, the authors found similarities between extinction spectra of the nanoparticles and spectra of emmitted second harmonic. This behavior can be explained by resonant excitation of localized surface plasmon resonances. This work was supported by the Region Alsace and by the Centre National de la Recherche Scientifique (CNRS).

Domaines: Optique / photonique

Christophe Hubert, Laurent Billot, Pierre-Michel Adam, Renaud Bachelot, Pascal Royer, et al.. Role of surface plasmon in second harmonic generation from gold nanorods. Applied Physics Letters, 2007, 90 (18), pp.181105/1-3. ⟨10.1063/1.2734503⟩. ⟨hal-00212190⟩