Mapping vibrational surface and bulk modes in a single nanocube

@article{Lagos2017MappingVS,
  title={Mapping vibrational surface and bulk modes in a single nanocube},
  author={Maureen J. Lagos and Andreas Tr{\"u}gler and Ulrich Hohenester and Philip E. Batson},
  journal={Nature},
  year={2017},
  volume={543},
  pages={529-532}
}
Imaging of vibrational excitations in and near nanostructures is essential for developing low-loss infrared nanophotonics, controlling heat transport in thermal nanodevices, inventing new thermoelectric materials and understanding nanoscale energy transport. Spatially resolved electron energy loss spectroscopy has previously been used to image plasmonic behaviour in nanostructures in an electron microscope, but hitherto it has not been possible to map vibrational modes directly in a single… 
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References

SHOWING 1-10 OF 39 REFERENCES
Phonon-enhanced light–matter interaction at the nanometre scale
TLDR
It is found that phonon-enhanced near-field coupling is extremely sensitive to chemical and structural composition of polar samples, permitting nanometre-scale analysis of semiconductors and minerals.
Phonon excitation by electron beams in nanographenes
Electron beams have the ability of exciting vibrational modes (phonons) in molecules and nanoclusters, which can be currently probed with atomic spatial resolution through electron energy-loss
Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons
Abstract The excitation of surface-phonon-polariton (SPhP) modes in polar dielectric crystals and the associated new developments in the field of SPhPs are reviewed. The emphasis of this work is on
Vibrational spectroscopy in the electron microscope
TLDR
It is demonstrated that the vibrational signal has both high- and low-spatial-resolution components, that the first component can be used to map vibrational features at nanometre-level resolution, and that the second component can been used for analysis carried out with the beam positioned just outside the sample—that is, for ‘aloof’ spectroscopy that largely avoids radiation damage.
Low-loss, extreme subdiffraction photon confinement via silicon carbide localized surface phonon polariton resonators.
TLDR
Using fabricated 6H-silicon carbide nanopillar antenna arrays, the observation of subdiffraction, localized SPhP resonances is reported on, promising to reinvigorate research in SPhp phenomena and their use for nanophotonic applications.
Three-dimensional imaging of localized surface plasmon resonances of metal nanoparticles
TLDR
3D images related to LSPRs of an individual silver nanocube can be reconstructed through the application of electron energy-loss spectrum imaging, mapping the excitation across a range of orientations, with a novel combination of non-negative matrix factorization, compressed sensing and electron tomography.
Optical excitations in electron microscopy
This review discusses how low-energy, valence excitations created by swift electrons can render information on the optical response of structured materials with unmatched spatial resolution. Electron
Mapping surface plasmons on a single metallic nanoparticle
Understanding how light interacts with matter at the nanometre scale is a fundamental issue in optoelectronics and nanophotonics. In particular, many applications (such as bio-sensing, cancer therapy
Is Localized Infrared Spectroscopy Now Possible in the Electron Microscope?
  • P. Rez
  • Physics
    Microscopy and Microanalysis
  • 2014
TLDR
Improvements in both resolution and controlling the zero-loss tail will be necessary before it is practical to detect optic phonons in solids between 40 and 60 meV.
...
1
2
3
4
...