Cylindrical Metalens for Generation and Focusing of Free-Electron Radiation
Aviv Karnieli, Dolev Roitman, Matthias Liebtrau, Shai Tsesses, Nika van Nielen, Ido Kaminer, Ady Arie, Albert Polman
Abstract
hyperspectral angle-resolved light detection in a scanning electron microscope. Furthermore, we theoretically explore simultaneous control over the polarization and wavefront of Smith-Purcell radiation via a split-ring-resonator metasurface, enabling tunable operation by spatially selective mode excitation at nanometer resolution. Our work highlights the potential of merging metasurfaces with free-electron excitations for versatile and highly tunable radiation sources in wide-ranging spectral regimes.
Topics & Concepts
OpticsPhysicsWavefrontRadiationFree electron modelElectronOptoelectronicsLaserQuantum mechanicsMetamaterials and Metasurfaces ApplicationsPlasmonic and Surface Plasmon ResearchOrbital Angular Momentum in Optics