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O: Fachverband Oberflächenphysik
O 7: Plasmonics and Nanooptics I
O 7.3: Talk
Monday, March 18, 2024, 11:00–11:15, MA 043
Attosecond electron microscopy by free-electron homodyne detection — John H. Gaida1,2, Hugo Lourenço-Martins1,2, •Murat Sivis1,2, Thomas Rittmann1,2, Armin Feist1,2, F. Javier García de Abajo3,4, and Claus Ropers1,2 — 1MPI for Multidisciplinary Sciences, Göttingen, Germany — 24th Physical Institute, University of Göttingen, Germany — 3ICFO-Institut de Ciencies Fotoniques, Castelldefels (Barcelona), Spain — 4ICREA-Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
Photon-induced near-field electron microscopy (PINEM) enables the imaging of near-field intensities [1,2]. However, access to the evolution of nanoscale fields and structures within the light cycle requires a sensitivity to the optical phase [3,4].
Here, we introduce Free-Electron Homodyne Detection (FREHD) for phase-resolved electron microscopy of optical responses [5], which we demonstrate for the plasmonic fields of a gold nanoprism with few-nanometer spatial and sub-cycle temporal resolutions.
Our approach generalizes the high-resolution measurement of attosecond materials responses in electron microscopy, without a need for electron density bunching, and offers fascinating new possibilities to image local attosecond and phase-resolved responses on the nanometer scale.
[1] B. Barwick, et al. Nature 462, 902 (2009). [2] L. Piazza et al. Nat Commun 6, 6407 (2015). [3] D. Nabben, et al. Nature 619, 63 (2023). [4] T. Bucher et al., arXiv:2305.04877 (2023). [5] J. H. Gaida, et al. arXiv:2305.03005 (2023).
Keywords: Attosecond; Near-field mapping; Electron microscopy; Phase resolved; Imaging