Tomographic imaging of the photonic environment of plasmonic nanoparticles.

ABSTRACT: The photonic local density of states (LDOS) governs the enhancement of light-matter interaction at the nanoscale, but despite its importance for nanophotonics and plasmonics experimental local density of states imaging remains extremely challenging. Here we introduce a tomography scheme based on electron microscopy that allows retrieval of the three-dimensional local density of states of plasmonic nanoparticles with nanometre spatial and sub-eV energy resolution. From conventional electron tomography experiments we obtain the three-dimensional morphology of the nanostructure, and use this information to compute an expansion basis for the photonic environment. The expansion coefficients are obtained through solution of an inverse problem using as input electron-energy loss spectroscopy imag

SUBMITTER: Horl A 

PROVIDER: S-EPMC5484695 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature