Shaping electron beams for the generation of innovative measurements in the (S)TEM
arXiv:1403.5457 · doi:10.1016/j.crhy.2013.09.014
Abstract
In TEM, a typical goal consists of making a small electron probe in the sample plane in order to obtain high spatial resolution in scanning transmission electron microscopy. In order to do so, the phase of the electron wave is corrected to resemble a spherical wave compensating for aberrations in the magnetic lenses. In this contribution we discuss the advantage of changing the phase of an electron wave in a specific way in order to obtain fundamentally different electron probes opening up new application in the (S)TEM. We focus on electron vortex states as a specific family of waves with an azimuthal phase signature and discuss their properties, production and applications. The concepts presented here are rather general and also different classes of probes can be obtained in a similar fashion showing that electron probes can be tuned to optimise a specific measurement or interaction.
References in corpus (21)
- Utilization of photon orbital angular momentum in the low-frequency radio domain
- Self accelerating electron Airy beams
- Semiclassical Dynamics of Electron Wave Packet States with Phase Vortices
- Collective Motion of Moshers at Heavy Metal Concerts
- Relativistic Electron Vortex Beams: Angular Momentum and Spin-Orbit Interaction
- Magnetic monopole field exposed by electrons
- Electron vortex beams in a magnetic field: A new twist on Landau levels and Aharonov-Bohm states
- Observation of the Larmor and Gouy Rotations with Electron Vortex Beams
- Spin-to-Orbital Angular Momentum Conversion and Spin-Polarization Filtering in Electron Beams
- Atomic scale electron vortices for nanoresearch
- A novel vortex generator and mode converter for electrons
- A new way of producing electron vortex probes for STEM
- Exploiting lens aberrations to create electron vortex beams
- Scattering of twisted particles: extension to wave packets and orbital helicity
- Vacuum Faraday effect for electrons
- Mapping spin-polarised transitions with atomic resolution
- Topological analysis of paraxially scattered electron vortex beams
- Electron vortices in crystals
- On-column 2p bound state with topological charge \pm1 excited by an atomic-size vortex beam in an aberration-corrected scanning transmission electron microscope
- Spin effects in electron vortex states
- The effect of Dirac phase on acoustic vortex in media with screw dislocation
Cited by in corpus (11)
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- Interaction of electron beams with optical nanostructures and metamaterials: From coherent photon sources towards shaping the wave function
- Schroedinger electrons interacting with optical gratings: quantum mechanical study of the inverse Smith Purcell effect
- Free-Electron Shaping Using Quantum Light
- Parallel axis theorem for free-space electron wavefunctions
- Dynamics of relativistic vortex electrons in external laser fields
- Automatic alignment of an orbital angular momentum sorter in a transmission electron microscope using a convolution neural network
- Generation and Application of Bessel Beams in Electron Microscopy