The metallic nanoparticles can strongly interact with light. They can provide some huge enhancement of the near field at the vicinity of the nanoparticle surface due to the excitation of the localised surface plasmon (LSP). Their plasmonic properties depend on the geometrical parameters (size, shape, coupling...) of the nanoaprticles. By using electron beam lithography, we can produce some arrays of nanostructures with high reproducibility at the nanometer scale. With such arrays, we can provide a fine control of the plasmonic properties and tune the LSP resonance on a wide range of wavelength. We are also able to reach the highest enhancement of the near-field.[1]
In this presentation, we will discuss the relation between the LSP and the enhancement efficiency depending on the geometrical parameters of the nanostructures.[2] We will also present how to exploit these properties in several applications : sensor development, identification of biomolecules [3] and study of their structure [4], thermal effect [5], surface functionalisation [6]...
This work is supported by the grant PIRANEX project (ANR-12-NANO-0016), the Louise project (ANR-15-CE04-0001) and the Nanobiosensor project (ANR-15-CE29-0026) from the French National Research Agency (ANR).
[1] N. Guillot , M. Lamy de la Chapelle, JQSRT 113, 2321, 2012
[2] F. Colas, et al., J. Phys. Chem. C120 (25), 13675, 2016
[3] M. Cottat, et al., J. Phys. Chem. C 119 15532, 2015
[4] M. Cottat, et al., Scientific Reports 7, 39766, 2017
[5] G. Picardi, et al., J. Phys. Chem. C120 (45), 26025, 2016
[6] I. Tijunelyte, et al., Nanoscale 7/13, 7105, 2016
