CNR NANO - Istituto Nanoscienze Consiglio Nazionale delle Ricerche

02.12.2021NANO COLLOQUIA S3 Avinash Vikatakavi

Date and Time: December 2, 2021 - 15.00 ONLINE

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home » surfaces and interfaces: nanofabrication, imaging & spectroscopy » quantum electron microscopy and

6. Quantum electron microscopy and characterization:

Contact person:
Vincenzo Grillo

The activity is aimed to develop “quantum” measurements with electrons in a transmission electron microscope. It exploits ideas and elements from light optics and quantum optics, especially holograph beam shaping and vortex beam, with the prospect of measuring new quantities in material science on atomic scale. Nanofabrication by focused ion beam and electron beam lithography of holographic phase plates, focused electron beam-induced deposition of nanostructures from metallic and magnetic gas precursors are peculiar technological methods for the implementation of quantum electron microscopy. Among the expected results there is the experimental realization and application of orbital angular momentum spectrometer (for plasmonic and magnetism measurements), the demonstration of quantum state tomography, the demonstration of forms of entanglement (e.g electron-plasmon or electron- light), some development in the direction of spin manipulation inside a microscope and new set-up for electron interference experiments.



Two measurements of magnetic fields based on electron vortex beam states.Electron Vortex beams (electron waves in free space but still characterized by a rotation around the propagation axis) are among the most innovative and fascinating topics on electron microscopy due to their connection to quantum optics and fundamental physics. Since their introduction, they have been connected to magnetic measurements. V. Grillo, T.R. Harvey, F. Venturi, J. S. Pierce, R. Balboni, F. Bouchard, G. C. Gazzadi, S. Frabboni, A. H. Tavabi, Z.-A. Li, R. E. Dunin-Borkowski, R. W. Boyd, B. J. McMorran, and E. Karimi, Observation of nanoscale magnetic fields using twisted electron beams, Nat. Commun , 8, 689 (2017) E. Mafakheri, A. H. Tavabi, P.-H. Lu, R. Balboni, F. Venturi, C. Menozzi, G. C. Gazzadi, S. Frabboni, A. Sit, R. E. Dunin-Borkowski, E. Karimi, and V. Grillo Realization of electron vortices with large orbital angular momentum using miniature holograms fabricated by electron beam lithography, ApplPhysLett , 110, 93113 (2017)