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 …
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 …
The IMPULSE project (In situ MaPping insulator-to-metal transitions by Ultra-high resolution electron SpEctromicroscopy) will develop the characterization tools capable of mapping at sub-nanometer scale the insulating/metallic (I/M) nanodomains induced by insulator-to-metal transition (IMT).
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, …
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 …
Structural, electronic, and chemical nanoscale modifications of transition metal dichalcogenide monolayers alter their optical properties. A key missing element for complete control is a direct spatial correlation of optical response …
Whispering-gallery mode resonators host multiple trapped narrow-band circulating optical resonances that find applications in quantum electrodynamics, optomechanics, and sensing. However, the spherical symmetry and low field leakage of dielectric microspheres …
