Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 116: Focus Session: Structural Dynamics in Nanoscale Materials, Probed by Ultrafast Electron Pulses III
O 116.4: Vortrag
Freitag, 16. März 2018, 11:30–11:45, HE 101
meV Resolution in Laser-Assisted Energy-Filtered Transmission Electron Microscopy — •Enrico Pomarico1, Ivan Madan1, Gabriele Berruto1, Giovanni Maria Vanacore1, Kangepeng Wang2, Ido Kaminer2, F. Javier García de Abajo3, 4, and Fabrizio Carbone1 — 1Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland — 2Andrew and Erna Viterbi Department of Electrical Engineering, Technion Israel Institute of Technology, 32000 Haifa, Israel — 3ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain — 4ICREA-Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys, 23, 08010 Barcelona, Spain
Dynamical characterization and manipulation of low energy excitations of quantum solids requires combining simultaneously nm-spatial, fs-temporal, and meV-spectral resolution.
We demonstrate a new method of spectrally-resolved photon induced near-field electron microscopy that allows us to obtain nm-fs resolved maps of nanoparticle plasmons with an energy resolution determined by the laser linewidth (20 meV in this work), and no longer limited by electron beam and spectrometer energy spreading (arXiv:1710.01183).
This technique can be extended to any optically-accessible low-energy mode, thus pushing TEM to a previously unattainable spectral domain with an unprecedented combination of space, energy, and temporal resolution.