149 citations · 441 across the 21 of their papers we have counts for
21 papers
Efficient methods for wave propagation in electron microscopy
Zdeněk Nekula, Jakub Bělín, Andrea Konečná
Accurate wave-optical simulation in electron microscopy is severely constrained by the extreme sampling requirements imposed by short wavelengths and relatively large convergence a…
Roadmap for Quantum Nanophotonics with Free Electrons
F. Javier García de Abajo, Albert Polman, Cruz I. Velasco +44
Over the past century, continuous advancements in electron microscopy have enabled the synthesis, control, and characterization of high-quality free-electron beams. These probes ca…
Exploring single-photon recoil on free electrons
Alexander Preimesberger, Dominik Hornof, Theo Dorfner +4
Recent advancements in time-resolved electron and photon detection enable novel correlative measurements of electrons and their associated cathodoluminescence (CL) photons within a…
Engineering 2D material exciton lineshape with graphene/h-BN encapsulation
Steffi Y. Woo, Fuhui Shao, Ashish Arora +20
Control over the optical properties of atomically thin two-dimensional (2D) layers, including those of transition metal dichalcogenides (TMDs), is needed for future optoelectronic…
Analytical electron microscopy analysis of insulating and metallic phases in nanostructured vanadium dioxide
Jan Krpenský, Michal Horák, Jiří Kabát +4
Vanadium dioxide (VO) is a strongly-correlated material that exhibits insulator-to-metal transition (IMT) near room temperature, which makes it a promising candidate for applic…
Spatio-spectral metrics in electron energy loss spectroscopy as a tool to resolve nearly degenerate plasmon modes in dimer plasmonic antennas
Michal Horák, Andrea Konečná, Tomáš Šikola +1
Electron energy loss spectroscopy (EELS) is often utilized to characterize localized surface plasmon modes supported by plasmonic antennas. However, the spectral resolution of this…
Single-Pixel Imaging in Space and Time with Optically-Modulated Free Electrons
Andrea Konečná, Enzo Rotunno, Vincenzo Grillo +2
Single-pixel imaging, originally developed in light optics, facilitates fast three-dimensional sample reconstruction, as well as probing with light wavelengths undetectable by conv…
Entangling free electrons and optical excitations
Andrea Konečná, Fadil Iyikanat, F. Javier García de Abajo
The inelastic interaction between flying particles and optical nanocavities gives rise to entangled states in which some excitations of the latter are paired with changes in the en…
Strong coupling in a Au plasmonic antenna-SiO layer system: a hybrid mode analysis
Pavel Gallina, Michal Kvapil, Jiří Liška +5
A detailed analysis of the optical response of a system accommodating several coupled modes is needed for the complete understanding of the strong coupling effect. In this paper, w…
Low-loss tunable infrared plasmons in the high-mobility perovskite (Ba,La)SnO
Hongbin Yang, Andrea Konečná, Xianghan Xu +4
BaSnO exhibits the highest carrier mobility among perovskite oxides, making it ideal for oxide electronics. Collective charge carrier oscillations, plasmons, are expected to ar…
Probing the electromagnetic response of dielectric antennas by vortex electron beams
Andrea Konecna, Mikolaj K. Schmidt, Rainer Hillenbrand +1
Focused beams of electrons, which act as both sources, and sensors of electric fields, can be used to characterise the electric response of complex photonic systems by locally prob…
Inelastic Scattering of Electron Beams by Nonreciprocal Nanotructures
Renwen Yu, Andrea Konečná, F. Javier García de Abajo
Probing optical excitations with high resolution is important for understanding their dynamics and controlling their interaction with other photonic elements. This can be done usin…
Nonlinear Tunable Vibrational Response in Hexagonal Boron Nitride
Fadil Iyikanat, Andrea Konečná, F. Javier García de Abajo
Nonlinear light-matter interactions in structured materials are the source of exciting properties and enable vanguard applications in photonics. However, the magnitude of nonlinear…
Revealing Nanoscale Confinement Effects on Hyperbolic Phonon Polaritons with an Electron Beam
Andrea Konečná, Jiahan Li, James H. Edgar +2
Hyperbolic phonon polaritons (HPhPs) in hexagonal boron nitride (hBN) enable the direct manipulation of mid-infrared light at nanometer scales, many orders of magnitude below the f…
Atomic-Scale Vibrational Mapping and Isotope Identification with Electron Beams
Andrea Konečná, Fadil Iyikanat, F. Javier García de Abajo
Transmission electron microscopy and spectroscopy currently enable the acquisition of spatially resolved spectral information from a specimen by focusing electron beams down to a s…
Optical Modulation of Electron Beams in Free Space
F. Javier García de Abajo, Andrea Konečná
We exploit free-space interactions between electron beams and tailored light fields to imprint on-demand phase profiles on the electron wave functions. Through rigorous semiclassic…
Probing and steering bulk and surface phonon polaritons in uniaxial materials using fast electrons: hexagonal boron nitride
C. Maciel-Escudero, Andrea Konečná, Rainer Hillenbrand +1
We theoretically describe how fast electrons couple to polaritonic modes in uniaxial materials by analyzing the electron energy loss (EEL) spectra. We show that in the case of an u…
Electron Beam Aberration Correction Using Optical Near Fields
Andrea Konečná, F. Javier García de Abajo
The interaction between free electrons and optical near fields is attracting increasing attention as a way to manipulate the electron wave function in space, time, and energy. Rely…
Independent engineering of individual plasmon modes in plasmonic dimers with conductive and capacitive coupling
Vlastimil Křápek, Andrea Konečná, Michal Horák +5
We revisit plasmonic modes in nanoparticle dimers with conductive or insulating junction resulting in conductive or capacitive coupling. In our study which combines electron energy…
Plasmonic antennas with electric, magnetic, and electromagnetic hot spots based on Babinet's principle
Martin Hrtoň, Andrea Konečná, Michal Horák +2
We theoretically study plasmonic antennas featuring areas of extremely concentrated electric or magnetic field, known as hot spots. We combine two types of electric-magnetic comple…
Probing low-energy hyperbolic polaritons in van der Waals crystals with an electron microscope
Alexander A. Govyadinov, Andrea Konečná, Andrey Chuvilin +8
Van der Waals (vdW) materials exhibit intriguing structural, electronic and photonic properties. Electron Energy Loss Spectroscopy (EELS) within Scanning Transmission Electron Micr…