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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)).