1308.0508 (Anton Hörl et al.)

Tomography of particle plasmon fields from electron energy loss
spectroscopy    [PDF]

Anton Hörl, Andreas Trügler, Ulrich Hohenester

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.

View original: http://arxiv.org/abs/1308.0508