We experimentally study simultaneous generation and focusing of free-electron radiation by a metalens, and explore theoretically metasurface lenses showing polarization control. Our work paves the way towards versatile and tunable free-electron metasurface light sources.

Photonic Materials

Karnieli, A., Roitman, D., Liebtrau, M., Tsesses, S., van Nielen, N., Kaminer, I., … Polman, A. (2022). Focusing free-electron radiation with source-embedded metalenses. In CLEO: QELS_Fundamental Science 2022, paper FM4F.2.. doi:10.1364/CLEO_QELS.2022.FM4F.2