We demonstrate focused emission of visible and near-infrared Smith-Purcell radiation by a free-electron-driven metasurface lens emitter. Our findings pave the way for free-electron light sources focusing at wavelengths lacking efficient optics.

OSA Technical Digest
doi.org/10.1364/CLEO_AT.2021.JTh3A.32
Photonic Materials

Karnieli, A. (Aviv), Roitman, D. (Dolev), Liebtrau, M. (Matthias), Tsesses, S. (Shai), van Nielen, N. (Nika), Polman, A., … Arie, A. (Ady). (2021). Smith-Purcell metasurface lens. In CLEO: QELS Fundamental Science 2021 - Part of Conference on Lasers and Electro-Optics. doi:10.1364/CLEO_AT.2021.JTh3A.32