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The remarkably-high intrinsic optical nonlinearity of graphene can be pushed even further when the optical frequency is tuned to plasmon resonances hosted by the material when it is doped [1-4]. Atomistic simulations provide an accurate description of these phenomena, although their computational cost is prohibitive for large graphene nanostructures [3, 4]. An alternative formalism consists in relying...
Plasmons — the collective electron excitations in conducting materials-provide interesting research avenues into fundamental phenomena. They are also instrumental in applications to ultrasensitive optical detection, biosensing, spectral photometry, light harvesting, photocatalysis, quantum optics, nonlinear photonics, and metamaterials. Recent developments in this field focus on the consequences of...
High-harmonic generation (HHG) is an extreme nonlinear optical phenomenon that is traditionally realized by driving atomic gases with intense ultrashort optical pulses, and usually relies on bulky laser amplification schemes to reach the enormous requisite electric field intensities. The realization of efficient HHG in solid-state systems is anticipated to pave the way for compact ultraviolet and...
Plasmons-the collective oscillations of electrons in conducting materials-play a pivotal role in nanophotonics because of their ability to couple electronic and photonic degrees of freedom. In particular, plasmons in graphene-the atomically thin carbon material-offer strong spatial confinement and long lifetimes, accompanied by extraordinary optoelectronic properties derived from its peculiar electronic...
Recent experimental [1–5] and theoretical [6–10] advances in the study of graphene plasmons have triggered the search for similar phenomena in other materials that are structured down to the atomic scale, and in particular, alternative 2D crystals [11], noble-metal monolayers [12], and polycyclic aromatic hydrocarbons, which can be regarded as molecular versions of graphene [13]. The number of valence...
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