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Open AccessActive control of micrometer plasmon propagation in suspended graphene
Due to the two-dimensional character of graphene, the plasmons sustained by this material have been invariably studied in supported samples so far. The substrate provides stability for graphene but often cause...
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Article
Open AccessNano-spectroscopy of excitons in atomically thin transition metal dichalcogenides
Excitons play a dominant role in the optoelectronic properties of atomically thin van der Waals (vdW) semiconductors. These excitons are amenable to on-demand engineering with diverse control knobs, including ...
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Article
Fizeau drag in graphene plasmonics
Dragging of light by moving media was predicted by Fresnel1 and verified by Fizeau’s celebrated experiments2 with flowing water. This momentous discovery is among the experimental cornerstones of Einstein’s speci...
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Article
Open AccessNano-imaging of strain-tuned stripe textures in a Mott crystal
The 4d transition metal perovskites Can+1RunO3n+1 have attracted interest for their strongly interacting electronic phases showing pronounced sensitivity to controllable stimuli like strain, temperature, and even...
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Article
Open AccessHyperbolic enhancement of photocurrent patterns in minimally twisted bilayer graphene
Quasi-periodic moiré patterns and their effect on electronic properties of twisted bilayer graphene have been intensely studied. At small twist angle θ, due to atomic reconstruction, the moiré superlattice morphs...
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Moiré engineering of electronic phenomena in correlated oxides
Moiré engineering has recently emerged as an effective approach to control quantum phenomena in condensed matter systems1–6. In van der Waals heterostructures, moiré patterns can be formed by lattice misorientati...
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Article
Multi-messenger nanoprobes of hidden magnetism in a strained manganite
The ground-state properties of correlated electron systems can be extraordinarily sensitive to external stimuli, offering abundant platforms for functional materials. Using the multi-messenger combination of a...
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Article
Open AccessPhotonic crystal for graphene plasmons
Photonic crystals are commonly implemented in media with periodically varying optical properties. Photonic crystals enable exquisite control of light propagation in integrated optical circuits, and also emulat...
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Article
Coexisting first- and second-order electronic phase transitions in a correlated oxide
The explanation and control of phase transitions remain cornerstones of contemporary physics. Landau provided an invaluable insight into the thermodynamics of complex systems by formulating their phase transit...
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Open AccessImaging the nanoscale phase separation in vanadium dioxide thin films at terahertz frequencies
Vanadium dioxide (VO2) is a material that undergoes an insulator–metal transition upon heating above 340 K. It remains debated as to whether this electronic transition is driven by a corresponding structural tran...
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Article
Fundamental limits to graphene plasmonics
Plasmon polaritons are hybrid excitations of light and mobile electrons that can confine the energy of long-wavelength radiation at the nanoscale. Plasmon polaritons may enable many enigmatic quantum effects, ...
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Article
Nanotextured phase coexistence in the correlated insulator V2O3
The insulator–metal transition remains among the most studied phenomena in correlated electron physics. However, the spontaneous formation of spatial patterns amidst insulator–metal phase coexistence remains p...
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Ultrafast optical switching of infrared plasmon polaritons in high-mobility graphene
Non-equilibrium photoinduced plasmons in a high-mobility graphene monolayer are investigated at infrared wavelengths.
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Open AccessSubdiffractional focusing and guiding of polaritonic rays in a natural hyperbolic material
Uniaxial materials whose axial and tangential permittivities have opposite signs are referred to as indefinite or hyperbolic media. In such materials, light propagation is unusual leading to novel and often no...
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Article
Nanoscale infrared spectroscopy as a non-destructive probe of extraterrestrial samples
Advances in the spatial resolution of modern analytical techniques have tremendously augmented the scientific insight gained from the analysis of natural samples. Yet, while techniques for the elemental and st...
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Article
Electronic and plasmonic phenomena at graphene grain boundaries
Graphene1, a two-dimensional honeycomb lattice of carbon atoms of great interest in (opto)electronics2,3 and plasmonics4,5,6,7,8,9,10,11, can be obtained by means of diverse fabrication techniques, among which ch...
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Gate-tuning of graphene plasmons revealed by infrared nano-imaging
Plasmons are directly launched in graphene, and their key parameters — propagation and attenuation — are studied with near-field infrared nano-imaging.
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Article
A Monte Carlo study of temperature‐programmed desorption from supported‐metal catalysts
The extent to which metal particle geometry and adsorbate spillover influence the temperature‐programmed desorption spectra for the desorption of hydrogen from supported‐metal catalysts has been studied by Mon...
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Monte Carlo simulation of kinetic discontinuities in hydrocarbon hydrogenation reactions
Recent experimental studies of alkene and alkyne hydrogenation reactions have shown the presence of a transition between a reactive regime at low hydrocarbon surface coverage and a less reactive regime in whic...
