title: Transformation Optics: A Time- and Frequency-Domain Analysis of Electron-Energy Loss Spectroscopy.
abstract: Electron energy loss spectroscopy (EELS) and cathodoluminescence (CL) play a pivotal role in many of the cutting edge experiments in plasmonics. EELS and CL experiments are usually supported by numerical simulations, which-though accurate-may not provide as much physical insight as analytical calculations do. Fully analytical solutions to EELS and CL systems in plasmonics are rare and difficult to obtain. This paper aims to narrow this gap by introducing a new method based on transformation optics that allows to calculate the quasistatic frequency- and time-domain response of plasmonic particles under electron beam excitation. We study a nonconcentric annulus (and ellipse in the Supporting Information ) as an example.
authors.affiliation: Blackett Laboratory, Department of Physics, Imperial College London , London SW7 2AZ, United Kingdom.
authors.forename: Matthias
authors.initials: M
authors.lastname: Kraft
authors.affiliation: School of Electrical and Electronic Engineering, Nanyang Technological University , Nanyang Avenue, 639798 Singapore.
authors.forename: Yu
authors.initials: Y
authors.lastname: Luo
authors.affiliation: Blackett Laboratory, Department of Physics, Imperial College London , London SW7 2AZ, United Kingdom.
authors.forename: J B
authors.initials: JB
authors.lastname: Pendry
keywords: EELS; frequency domain; time domain; transformation optics