137 citations · 375 across the 9 of their papers we have counts for
11 papers
Synthesizing free-electron wave functions by stimulated near-field interactions
Álvaro Rodríguez Echarri, Albert Polman
Stimulated electron-optical-near-field interactions imprint a coherent, phase-coherent modulation on the wave function of a free electron, of which the free-space dispersion subseq…
Plasmon-Enhanced Second-Harmonic Generation in Atomically Thin Crystalline Silver Nanostructures
Saad Abdullah, Philipp K. Jenke, Andrew P. Weber +8
The intrinsically weak nonlinear optical response of existing materials, further constrained by symmetry-forbidden second-order processes in centrosymmetric media, severely limits…
Active steering of cathodoluminescence through a generalized Smith-Purcell effect
Eduardo J. C. Dias, Álvaro Rodríguez Echarri, Theis P. Rasmussen +2
Optical metasurfaces can shape the near fields of energetic electrons, enabling Smith-Purcell (SP) emission. We introduce a generalized SP effect relying on finite periodic arrays…
Roadmap for Photonics with 2D Materials
F. Javier García de Abajo, D. N. Basov, Frank H. L. Koppens +145
Triggered by the development of exfoliation and the identification of a wide range of extraordinary physical properties in self-standing films consisting of one or few atomic layer…
Generation of entangled waveguided photon pairs by free electrons
Theis P. Rasmussen, Álvaro Rodríguez Echarri, Joel D. Cox +1
Entangled photon pairs are a key resource in future quantum-optical communication and information technologies. While high-power laser light propagating in bulk nonlinear optical c…
Nonlinear photoluminescence in gold thin films
A. Rodríguez Echarri, F. Iyikanat, S. Boroviks +3
Promising applications in photonics are driven by the ability to fabricate crystal-quality metal thin films of controlled thickness down to a few nanometers. In particular, these m…
Anisotropic Second Harmonic Generation From Monocrystalline Gold Flakes
Sergejs Boroviks, Torgom Yezekyan, Álvaro Rodríguez Echarri +5
Noble metals with well-defined crystallographic orientation constitute an appealing class of materials for controlling light-matter interactions on the nanoscale. Nonlinear optical…
Optical response of noble metal nanostructures: Quantum surface effects in crystallographic facets
A. Rodríguez Echarri, P. A. D. Gonçalves, C. Tserkezis +3
Noble metal nanostructures are ubiquitous elements in nano-optics, supporting plasmon modes that can focus light down to length scales commensurate with nonlocal effects associated…
Theory of EELS in atomically thin metallic films
A. Rodríguez Echarri, Enok Johannes Haahr Skjølstrup, Thomas G. Pedersen +1
We study strongly confined plasmons in ultrathin gold and silver films by simulating electron energy-loss spectroscopy (EELS). Plasmon dispersion relations are directly retrieved f…
Quantum Effects in the Acoustic Plasmons of Atomically-Thin Heterostructures
A. Rodríguez Echarri, Joel D. Cox, F. Javier García de Abajo
Recent advances in nanofabrication technology now enable unprecedented control over 2D heterostructures, in which single- or few-atom thick materials with synergetic opto-electroni…
Plasmonics in Atomically-Thin Crystalline Silver Films
Zakaria M. Abd El-Fattah, Vahagn Mkhitaryan, Jens Brede +9
Light-matter interaction at the atomic scale rules fundamental phenomena such as photoemission and lasing, while enabling basic everyday technologies, including photovoltaics and o…