Nanoparticle surface electromagnetic fields studied by single-particle nonlinear optical spectroscopy
- 27 November 2012
- journal article
- Published by Royal Society of Chemistry (RSC) in Physical Chemistry Chemical Physics
- Vol. 15 (12), 4177-4182
- https://doi.org/10.1039/c2cp43271d
Abstract
Polarization-resolved second harmonic generation (SHG) measurements were performed on solid gold nanosphere (SGN) dimers at the single-particle level. The results indicated that single-particle SHG measurements could be used to quantify the localized electromagnetic surface fields that result from excitation of inter-particle localized surface plasmon modes. For several dimers, the polarization-resolved measurements revealed that the surface fields localized between SGNs in a dimer were chiral. Quantitative analysis of SHG line shapes obtained from single-particle continuous polarization variation (CPV-SHG) experiments confirmed that the chirality originated from non-zero magnetic-dipolar contributions to the SGN dimer nonlinear optical response. Correlation of SEM images and single-particle SHG measurements obtained for several SGN dimers, as well as lithographically generated nanostructures, were used to demonstrate the structure sensitivity of the CPV-SHG method.Keywords
This publication has 31 references indexed in Scilit:
- Plasmonic Nanoparticle Networks for Light and Heat ConcentrationACS Nano, 2012
- Magnetic Dipolar Interactions in Solid Gold Nanosphere DimersJournal of the American Chemical Society, 2012
- The golden age: gold nanoparticles for biomedicineChemical Society Reviews, 2011
- Preparation and Photoelectrochemical Properties of CdSe/TiO2 Hybrid Mesoporous StructuresThe Journal of Physical Chemistry Letters, 2009
- Plasmonic Ratchet Wheels: Switching Circular Dichroism by Arranging Chiral NanostructuresNano Letters, 2009
- Plasmonic photothermal therapy (PPTT) using gold nanoparticlesLasers in Medical Science, 2007
- On the Universal Scaling Behavior of the Distance Decay of Plasmon Coupling in Metal Nanoparticle Pairs: A Plasmon Ruler EquationNano Letters, 2007
- Multipole Interference in the Second-Harmonic Optical Radiation from Gold NanoparticlesPhysical Review Letters, 2007
- Why gold nanoparticles are more precious than pretty gold: Noble metal surface plasmon resonance and its enhancement of the radiative and nonradiative properties of nanocrystals of different shapesChemical Society Reviews, 2005
- Optical Constants of the Noble MetalsPhysical Review B, 1972