Tomography of particle plasmon fields from electron energy loss spectroscopy

Abstract

We theoretically investigate electron energy loss spectroscopy (EELS) of metallic nanoparticles in the optical frequency domain. Using a quasistatic approximation scheme together with a plasmon eigenmode expansion, we show that EELS can be rephrased in terms of a tomography problem. For selected single and coupled nanoparticles we extract the three-dimensional plasmon fields from a collection of rotated EELS maps. Our results pave the way for a fully three-dimensional plasmon-field tomography and establish EELS as a quantitative measurement device for plasmonics.

5 pages, to appear in Phys. Rev. Lett. (2013)

References in corpus (3)

• Optical excitations in electron microscopy
• MNPBEM - A Matlab toolbox for the simulation of plasmonic nanoparticles
• Surface plasmon modes of a single silver nanorod: an electron energy loss study

Cited by in corpus (8)

• Electron Beam Spectroscopy for Nanophotonics
• Simulating electron energy loss spectroscopy with the MNPBEM toolbox
• Entanglements of electrons and cavity-photons in the strong coupling regime
• Controlling free electrons with optical whispering-gallery modes
• Extremely confined gap surface plasmon modes excited by electrons
• Characterizing localized surface plasmons using electron energy-loss spectroscopy
• Vibrational surface EELS probes confined Fuchs-Kliewer modes
• Tomographic reconstruction of quasistatic surface polariton fields