"Plasmonic resonance in C60 fullerens using a quantum hydrodynamic model"

 

 

 

 

SPEAKER: Dr. FATEMA TANJIA, Marie Skodowska-Curie Postdoctoral Fellow at Centre National de la Recherche Scientifique (CNRS), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS).

 

PROPONENT: Prof. Renato Fedele

 

 

 

 

Abstract

 

Contributors: F. Tanjia*, J. Hurst, P.-A. Hervieux and G. Manfredi Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS and Université de Strasbourg, BP 43, F-67034 Strasbourg Cedex 2, France

 

Recent years have witnessed a remarkable surge in interest for the electronic properties of new materials, particularly when excited by electromagnetic radiation. We particularly focus our attention on metallic nano-objects and the composite metamaterials that can be constructed out of them, such as networks of interacting nanoparticles. Standard methods to study the electron response – such as the time-dependent density functional theory (TDDFT) or Hartree-Fock (HF) equations – are computationally very costly in terms of run time and memory storage. On the other hand, recent approaches rely on much simpler methods based on improvements of the classical Mie theory.

 

In this particular work we are intended in the development and implementation of a set of quantum hydrodynamic (QHD) models to investigate many open problems in the emerging field of nanoplasmonics. Such models are sufficiently simple to be run on standard computers (desktop PC or small university cluster), but contain enough physics to study the electron response beyond the Mie model – in particular nonlinear, nonlocal, and quantum effects. The combination of flexibility and accuracy of QHD models makes them an ideal tool to investigate many open problems in the emerging field of nanoplasmonics.

 

We have studied so far the breathing mode of C60 fullerenes by implementing QHD model. The ground state and the linear response frequency of the system is studied. The electrons oscillate with a frequency of the order of plasma oscillations (volume plasmon). A further investigation to study the dipole mode in the nonlinear regime is under way. In the near future nonlinear, nonlocal, and quantum effects of several configurations of nano-objects (i.e., dimers and trimers of metallic nanoparticles, nanoshells, metal-dielectric multilayers, nanoparticles in the vicinity of a thin metal film, and arrays of nanoparticles interacting via the dipole force) will be studied.

 

This work is a part of the project QHYDRO funded by European Commission under the action of Marie Skodowska-Curie Individual Fellowships (H2020-MSCA-IF-2015-EF).