Mapping vibrational surface and bulk modes in a single nanocube

  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},
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… 
Tailored Nanoscale Plasmon-Enhanced Vibrational Electron Spectroscopy
It is experimentally demonstrated that the interaction between a relativistic electron and vibrational modes in nanostructures is fundamentally modified in the presence of plasmons, holding great potential for investigating sensing mechanisms and chemistry in complex nanomaterials down to the molecular level.
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A widely applicable method for accessing phonon dispersions of materials at high spatial resolution is demonstrated and should allow for direct correlation of nanoscale vibrational mode dispersions with atomic-scale structure and chemistry.
Strong Phonon-Plasmon Coupling Between Nanoscale Antennas
Over the last few years, the development of highly monochromatic atom-wide electron beams have given us opportunities to explore collective excitations (plasmon, phonons) and map their corresponding
Position and momentum mapping of vibrations in graphene nanostructures
A new pathway is provided to determine phonon dispersions down to the scale of an individual free-standing graphene monolayer by mapping the distinct vibrational modes for a large momentum transfer.
Three dimensional vectorial imaging of surface phonons.
While phonons and their related properties have been studied comprehensively in bulk materials, a thorough understanding of surface phonons for nanoscale objects remains elusive. Infra-red imaging
Investigating Thermal Behavior of Surface Phonon in SiC by in-situ Vibrational Spectroscopy
Monochromated electron energy-loss spectroscopy (EELS) has the capability of detecting vibrational spectrum of materials with energy resolution of sub-10 meV. Utilizing such powerful technique in
Probing Far-Infrared Surface Phonon Polaritons in Semiconductor Nanostructures at Nanoscale.
This work paves the way for spatial-resolved investigation of SPhPs by electron probes and forwards polaritonics in the far-infrared range by mapping localized modes in nanowires and flakes and showing that surface phonon polariton behaviors can be well described by the local continuum dielectric model.
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The capabilities of a state-of-the-art transmission electron microscope open the door to the direct mapping of phonon propagation around defects, which is expected to provide useful guidance for engineering the thermal properties of materials.
Unexpected strong thermally-induced phonon energy shift for mapping local temperature.
An unexpected strong, thermally-induced phonon energy shift in SiC is reported by spatially-resolved vibrational spectroscopy in transmission electron microscopy with in-situ heating, demonstrating that this shift can be applied as a useful tool for measuring nanoscale temperature.
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Recent developments of highly monochromatic atom-wide electron beams have held promise to allow exploration of phonon excitations in nanomaterials with high spatial resolution. The experimental data,


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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.
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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
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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
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.
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
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
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.