Title Participants Abstract
"Modal Analysis in Uunderstanding the Optical Rresponse of a Nanoantenna" "Xuezhi Zheng, Guy Vandenbosch, Victor Moshchalkov" "This paper describes the use of modal analysis in understanding the optical response of a nanoantenna. First of all, the light-nanoantenna problem for a given incident field is formulated by a Volumetric Integral Equation (VIE). Then, standard and non-standard eigenvalue problems for nanoantennas are introduced and numerically implemented within the framework of the Volumetric Method of Moments (V-MoM) algorithm. The standard and non-standard eigenvalues and eigenfunctions are extracted for a stripe and a dimer nanostructure, with their effects on the antenna's optical response analyzed."
"Understanding the Physical Behavior of Plasmonic Antennas Through Computational Electromagnetics" "Xuezhi Zheng, Guy Vandenbosch, Victor Moshchalkov" "This chapter focuses on understanding the electromagnetic response of nanoscopic metallic antennas through a classical computational electromagnetic algorithm: volumetric method of moments (V-MoMs). Under the assumption that metals only respond to external electromagnetic disturbance locally,we rigorously formulate the light-nanoantenna interaction in terms of a volume integral equation (VIE) and solve the equation by using the method of moments algorithm. Modes of a nanoantenna, as the excitation independent solution to the volume integral equation (VIE), are introduced to resolve the antenna’s complex optical spectrum. Group representation theory is then employed to reveal how the symmetry of a nanoantenna defines the modes’ properties and determines the antenna’s optical response. Through such a treatment, a set of tools that can systematically treat the interaction of light with a nanoantenna is developed, paving the road for future nanoantenna design."
"Recent Progress in the Analysis of Plasmonic Antennas" "Xuezhi Zheng, Guy Vandenbosch, Victor Moshchalkov" "© 2015 IEEE. In this paper, we describe the light-plasmonic nanoantennas interactions based on a Volume Integral Equation (VIE) formulation. We especially focus on the standard and non-standard eigenvalue problem for a nanoantenna. Their implementations in a Volumetric Method of Moments algorithm are discussed as well."
"A Boundary Integral Equation Scheme for Simulating the Nonlocal Hydrodynamic Response of Metallic Antennas at Deep-Nanometer Scales" "Xuezhi Zheng, Mario Kupresak, Raj Mittra, Guy Vandenbosch" "© 1963-2012 IEEE. Modeling the interaction between light and a plasmonic nanoantenna, whose critical dimension is of a few nanometers, is complex owing to the 'hydrodynamic' motion of free electrons in a metal. Such a hydrodynamic effect inevitably leads to a nonlocal material response, which enables the propagation of longitudinal electromagnetic waves in the material. In this paper, within the framework of a boundary integral equation and a method of moments algorithm, a computational scheme is developed for predicting the interaction of light with 3-D nonlocal hydrodynamic metallic nanoparticles of arbitrary shape. The numerical implementation is first demonstrated for the test example of a canonical spherical structure. The calculated results are shown to be in the excellent agreement with the theoretical results obtained with the generalized Mie theory. In addition, the capability of treating 3-D structures of general shapes is demonstrated by ellipsoids and dimers."