Roadmap for Quantum Nanophotonics with Free Electrons
We have part of a large effort of the community led by Pr Javier Garcia de Abajo to write a roadmap for quantum nanophotonics with free electrons. Check it out! …
Plasmon-Interband Hybridization and Anomalous Production of Hot Electrons in Aluminum Nanoantennas
Strong coupling typically occurs between two separate objects or between an object and its environment (such as an atom and a cavity). However, it can also occur between two different …
Nanosecond Nanothermometry in an Electron Microscope
Thermal transport in nanostructures plays a critical role in modern technologies. As devices shrink, techniques that can measure thermal properties at nanometer and nanosecond scales are increasingly needed to capture …
Quantum Confined Luminescence in Two Dimensions
The field of nanophotonics has witnessed a surge of interest in localized light emitters, driven by their potential to revolutionize optoelectronic devices. These emitters, including nanoparticles, nanowires, and quantum wells, …
High-Efficiency Coupling of Free Electrons to Sub-wavelength cube Modal Volume, High‐Q Photonic Cavities
We report on the design, realization, and experimental investigation by spatially resolved monochro- mated electron energy loss spectroscopy (EELS) of high- quality-factor cavities with modal volumes smaller than λ3, with …
Valence-Ordered Thin-Film Nickelate with Tri-component Nickel Coordination Prepared by Topochemical Reduction
In a groundbreaking study, researchers have synthesized Sm9Ni9O22 using the metal-hydride-based “topochemical reduction” process. This compound exhibits ordered nickel valences associated with tri-component coordination configurations, resulting in a unique crystal …
μeV electron spectromicroscopy using free-space light
The synergy between free electrons and light has recently been leveraged to reach an impressive degree of simultaneous spatial and spectral resolution, enabling applications in microscopy and quantum optics. However, …
Excitonic absorption signatures of twisted bilayer WSe2 by electron energy-loss spectroscopy
Moiré twist angle underpins the interlayer interaction of excitons in twisted van der Waals hetero- and homostructures. The influence of twist angle on the excitonic absorption of twisted bilayer tungsten …
Cathodoluminescence excitation spectroscopy: Nanoscale imaging of excitation pathways
Following optical excitations’ life span from creation to decay into photons is crucial in understanding materials photophysics. Macroscopically, this is studied using optical techniques, such as photoluminescence excitation spectroscopy. However, …
Substrate influence on transition metal dichalcogenide monolayer exciton absorption linewidth broadening
The excitonic states of transition metal dichalcogenide (TMD) monolayers are heavily influenced by their external dielectric environment and depend on the substrate used. In this work, various wide band gap …