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Mid-Infrared Plasmonic Biosensing with Graphene
(Science, 2015-07-10)
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Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. However, infrared light interacts poorly with nanometric-size molecules. We exploit the ...
Ultrafast nonlinear optical response of Dirac fermions in graphene
(Nature, 2018-03-09)
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The speed of solid-state electronic devices, determined by the temporal dynamics of charge
carriers, could potentially reach unprecedented petahertz frequencies through direct
manipulation by optical fields, consisting ...
Transient nonlinear plasmonics in nanostructured graphene
(OSA, 2018-04-06)
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Plasmons in highly doped graphene offer the means to dramatically enhance light absorption in the atomically thin
material. Ultimately the absorbed light energy induces an increase in electron temperature, accompanied by ...
Phonon excitation by electron beams in nanographenes
(APS, 2015-09-30)
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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 spectroscopy (EELS).
This ...
Enhanced graphene nonlinear response through geometrical plasmon focusing
(AIP, 2018-01-01)
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We propose a simple approach to couple light into graphene plasmons and focus these excitations at
focal spots of a size determined by the plasmon wavelength, thus producing high optical field
enhancement that boosts the ...
Interference of surface plasmons and Smith-Purcell emission probed by angle-resolved cathodoluminescence spectroscopy
(APS, 2015-03-30)
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We investigate the interplay between geometrical lattice resonances and surface plasmons mediating the emission of Smith-Purcell visible light via angle-resolved cathodoluminescence spectroscopy. We observe strong modulations ...
Optimization of Nanoparticle-Based SERS Substrates through Large-Scale Realistic Simulations
(ACS, 2016-12-20)
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Surface-enhanced Raman scattering (SERS) has
become a widely used spectroscopic technique for chemical
identification, providing unbeaten sensitivity down to the singlemolecule
level. The amplification of the optical ...
Electron refraction at lateral atomic interfaces
(AIP, 2017-10-01)
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We present theoretical simulations of electron refraction at the lateral atomic interface between a
“homogeneous” Cu(111) surface and the “nanostructured” one-monolayer (ML) Ag/Cu(111) dislocation
lattice. Calculations ...
Plasmons in doped finite carbon nanotubes and their interactions with fast electrons and quantum emitters
(APS, 2016-08-31)
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We study the potential of highly doped finite carbon nanotubes to serve as plasmonic elements that mediate the interaction between quantum emitters. Similar to graphene, nanotubes support intense plasmons that can be ...
Electrical control of optical emitter relaxation pathways enabled by graphene
(Nature Publishing Group, 2015-01-19)
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Controlling the energy flow processes and the associated energy relaxation rates of a light emitter is of fundamental interest and has many applications in the fields of quantum optics, photovoltaics, photodetection, ...