报告人：Giuseppe Toscano（Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology (KIT), Kalrsuhe, Germany）

报告时间：2015.10.16（周五）下午16:00

报告地点：物理学院新建物理楼五楼多功能报告厅

Abstract：

The ongoing miniaturization of nanoplasmonic structures down to sizes comparable to the Fermi wavelength of the electrons, calls for a description that captures the emerging quantum effects. To this end, we proposed the use of the Hydrodynamic Drude Model with hard-wall boundary conditions (HW-HDM), which has proven to give accurate quantitative predictions for the optical response of noble-metal nanoparticles. However, the HW-HDM fails to describe other metallic nanosystems, where surface effects due to electron density spill-out in free space cannot be neglected. Here I will survey a more general formulation of the hydrodynamic model called Self-Consistent Hydrodynamic Model (SC-HDM), which allows to determine self-consistently both the ground state and excited state properties of a generic electronic system. In this new context, spill-out effects arise naturally. I will discuss the implementation of this model as an add-on to standard commercial software (COMSOL 4.4), and I will show the results obtained for both sodium and silver nanoparticles. The accuracy of the SC-HDM is comparable with that of fully quantum mechanical methods, and it allows to treat large systems that are of interest in the plasmonic applications.

报告人简介:

Giuseppe Toscano was born in Caserta, Italy in 1982. He obtained a BSc' s degree in Electrical Engineering from the University of Naples in 2005 and a MSc' s degree in Engineering Science from the University of Rome in 2008. In 2009 he was a PhD student in Prof. Mortensen's group at the Technical University of Denmark (DTU). He obtained his PhD in physics in 2013 with a thesis on nonlocal effects in plasmonic nanostructures. In 2013 he worked as postdoc in Prof. Xu' s group at Wuhan University. From 2014 he works as postdoc at the Karlrsuhe Institute of Technology (KIT) in Karlsruhe (Germany) in Prof. Rockstuhl's group.

邀请方：武汉大学纳米中心