Experimental Demonstration of an Electrostatic Orbital Angular Momentum Sorter for Electron Beams

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

doi:10.1103/physrevlett.126.094802

Cited by 56 publications

(33 citation statements)

References 59 publications

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“…They suggested to improve the effectiveness of their sorter by substituting the holograms with electrostatic fields to reduce absorption. In 2021, Tavabi et al 61 demonstrated such an electrostatic sorter.…”

Section: Applicationsmentioning

confidence: 99%

Shaping of Electron Beams Using Sculpted Thin Films

Roitman

Shiloh

et al. 2021

ACS Photonics

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Electron beam shaping by sculpted thin films relies on electron–matter interactions and the wave nature of electrons. It can be used to study physical phenomena of special electron beams and to develop technological applications in electron microscopy that offer new and improved measurement techniques and increased resolution in different imaging modes. In this Perspective, we review recent applications of sculpted thin films for electron orbital angular momentum sorting, improvements in phase contrast transmission electron microscopy, and aberration correction. For the latter, we also present new results of our work toward correction of the spherical aberration of Lorentz scanning transmission electron microscopes and suggest a method to correct chromatic aberration using thin films. This review provides practical insight for researchers in the field and motivates future progress in electron microscopy.

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Section: Applicationsmentioning

confidence: 99%

Shaping of Electron Beams Using Sculpted Thin Films

Roitman

Shiloh

et al. 2021

ACS Photonics

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“…While space representation is the one most commonly used, other representations could be more appropriate. One typical example is the angular basis, which includes the radial degree of freedom and orbital angular momentum (OAM) of the electron beam (Verbeeck et al, 2010;McMorran et al, 2011;Grillo et al, 2017;Tavabi et al, 2021), and allows one to improve the efficiency of the measurement by increasing the amount of information that can be accessed in the measurement.…”

Section: Quantum Sortermentioning

confidence: 99%

“…Figure 6 represents the scheme of the electron microscope in the special configuration able to change the representation from a Cartesian to an angular basis. The device has already been demonstrated experimentally (Tavabi et al, 2021). Two coupled phase holograms or two equivalent electrostatic phase elements are placed in the microscope.…”

Section: Quantum Sortermentioning

confidence: 99%

Single-particle cryo-EM: alternative schemes to improve dose efficiency

Zhang¹,

Lu²,

Rotunno³

et al. 2021

J Synchrotron Radiat

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Imaging of biomolecules by ionizing radiation, such as electrons, causes radiation damage which introduces structural and compositional changes of the specimen. The total number of high-energy electrons per surface area that can be used for imaging in cryogenic electron microscopy (cryo-EM) is severely restricted due to radiation damage, resulting in low signal-to-noise ratios (SNR). High resolution details are dampened by the transfer function of the microscope and detector, and are the first to be lost as radiation damage alters the individual molecules which are presumed to be identical during averaging. As a consequence, radiation damage puts a limit on the particle size and sample heterogeneity with which electron microscopy (EM) can deal. Since a transmission EM (TEM) image is formed from the scattering process of the electron by the specimen interaction potential, radiation damage is inevitable. However, we can aim to maximize the information transfer for a given dose and increase the SNR by finding alternatives to the conventional phase-contrast cryo-EM techniques. Here some alternative transmission electron microscopy techniques are reviewed, including phase plate, multi-pass transmission electron microscopy, off-axis holography, ptychography and a quantum sorter. Their prospects for providing more or complementary structural information within the limited lifetime of the sample are discussed.

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“…One of the most significant recent developments is electron beam shaping through electron optical components based on microelectromechanical systems technology [4] that can be used to generate vortex beams [5], non-diffracting beams [6], compact aberration correctors [7] and quantum state analysers [8].…”

Section: Modena Modena Emilia-romagna United Statesmentioning

confidence: 99%