Design, Realization and Challenges of an Orbital Angular Momentum Sorter: A New Instrument for Phase Microscopy

Tavabi, Amir H.; Rosi, Paolo; Pozzi, Giulio; Roncaglia, Alessandro; Frabboni, Stefano; Rotunno, Enzo; Lu, Peng-Han; Nijland, Robert; Tiemeijer, Peter; Ghosh, M. R.; Karimi, Ebrahim; Dunin‐Borkowski, Rafal E.; Grillo, Vincenzo

doi:10.1017/s1431927620018449

Cited by 2 publications

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“…The recent introduction of beam shaping techniques [7,8] has allowed the application to electron microscopy of concepts originally de-* enzo.rotunno@nano.cnr.it veloped in quantum optics. In particular, through the use of appropriate electrostatic elements [9][10][11] or holograms [12], one can implement the measurement of different observables. The most considerable case is the recently demonstrated orbital angular momentum (OAM) sorter [13,14], which permits a direct measurement of the orbital angular momentum.…”

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confidence: 99%

Efficient molecule discrimination in electron microscopy through an optimized orbital angular momentum sorter

et al. 2020

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We reformulate the single-molecule analysis in an electron microscope in terms of a quantum-state discrimination problem, and discuss its implementation through electron-beam shaping. Our approach relies on the use of new electron-optical elements to efficiently extract the "which-molecule" information from the state of each electron. The optimal observables are formally derived, and subsequently implemented by suitably designed phase elements in a generalized orbital angular momentum sorter. As a representative example, we simulate the discrimination between model proteins and benchmark the performance of the sorter against that of the best known real-space approach.

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