Nonlinear optical properties of Ag nanoparticles embedded in Si3 N4

A. Traverse; C. Humbert; C. Six; A. Gayral; B. Busson

doi:10.1209/0295-5075/83/64004

All issues

Volume 83 / No 6 (September 2008)

EPL, 83 6 (2008) 64004

Abstract

Issue		EPL Volume 83, Number 6, September 2008


Article Number		64004
Number of page(s)		5
Section		Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
DOI		https://doi.org/10.1209/0295-5075/83/64004
Published online		15 September 2008

EPL, 83 (2008) 64004

Nonlinear optical properties of Ag nanoparticles embedded in Si₃ N₄

A. Traverse, C. Humbert, C. Six, A. Gayral and B. Busson

Laboratoire de Chimie Physique, Université Paris-Sud, CNRS - Bâtiment 349, 91405 Orsay, France, EU

Corresponding author: agnes.traverse@u-psud.fr

Received: 29 May 2008
Accepted: 1 August 2008

Abstract

A two-colour sum-frequency generation (2C-SFG) spectroscopy experiment was carried out on an assembly of Ag nanoparticles embedded in a Si₃ N₄ matrix. The visible beam was fixed either at $\omega _{{\rm vis}}$ = 441.6 nm in the surface plasmon resonance (SPR) of the Ag nanoparticles or at $\omega _{{\rm vis}}$ = 632.8 nm, out of the SPR. The SFG signal was detected while the infrared beam was scanned around 1100 cm^-1, a spectral range where an absorption signal has been detected in infrared (IR) reflection absorption spectroscopy. At $\omega _{{\rm vis}}$ = 441.6 nm, the SFG signal put in evidence an electronic resonance contrary to $\omega _{{\rm vis}}$ = 632.8 nm. This second-order nonlinear process is related to the nanostructured system. An interpretation is given in terms of an electronic state arising at the interface of the metallic cluster and the insulating matrix.

PACS: 42.65.An – Optical susceptibility, hyperpolarizability / 73.22.-f – Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 81.07.Bc – Nanocrystalline materials

© EPLA, 2008

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