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O: Fachverband Oberflächenphysik

O 18: Plasmonics and Nanooptics II: Ultrafast and Nonlinear Phenomena (joint session O/CPP)

O 18.11: Vortrag

Montag, 16. März 2020, 17:45–18:00, WIL A317

Electron-Driven Photon-Sources for Spectral Interferometry using Electron Microscopes — Nika van Nielen³, Mario Hentschel², Harald Giessen², Albert Polman³, and •Nahid Talebi¹ — ¹Institute für Experimentelle und Angewandte Physik, Christian Albrechts Universität zu Kiel, D-24118 Kiel, Deutschland — ²4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany — ³Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands

Electron beams can inelastically interact with matters, and as a result, photons are emitted to the far-field. Mechanisms of electron-induced radiations are numerous, covering Cherenkov radiation, transition radiation, and plasmon-induced radiation, to name a few (Rev. Mod. Phys. 82, 209 (2010)). Here, we report on metamaterial- and photon-sieve-based structures for tailoring the electron-induced emission (Nature communications 10 (1), 599 (2019)). By engineering the dispersion of the interface optical modes, radiation relaxation channels for the plasmon polaritons supported by our engineered thin film are formed, leading to an enhanced electron-induced radiation. We also particularly emphasize on the generation of chiral light using plasmonic chains of nanohole arrays. Moreover, we outline our efforts towards realization of combined electron-photon spectroscopy techniques for investigating nanooptical systems in electron microscopes, using electron-driven photon sources (Scientific Reports 6, 33874 (2016)).