Probing the photonic local density of states with electron energy loss spectroscopy

Details Probing the photonic local density of states with electron energy loss spectroscopy Probing the photonic local density of states with electron energy loss spectroscopy

2007-10-29

arxiv.org/abs/0710.5553v1

Physical Review Letters 100, 106804 (2008)

Physics

Condensed Matter

Materials Science

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.100.106804

Electron energy-loss spectroscopy (EELS) performed in transmission electron microscopes is shown to directly render the photonic local density of states (LDOS) with unprecedented spatial resolution, currently below the nanometer. Two special cases are discussed in detail: (i) 2D photonic structures with the electrons moving along the translational axis of symmetry and (ii) quasi-planar plasmonic structures under normal incidence. Nanophotonics in general and plasmonics in particular should benefit from these results connecting the unmatched spatial resolution of EELS with its ability to probe basic optical properties like the photonic LDOS.

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