Structural dynamics probed by high-coherence electron pulses
arXiv:2008.11124 · doi:10.1557/mrs.2018.153
Abstract
Ultrafast measurement technology provides essential contributions to our microscopic understanding of the properties and functions of solids and nanostructures. Atomic-scale vistas with ever-growing spatial and temporal resolution are offered by methods based on short pulses of x-rays and electrons. Time-resolved electron diffraction and microscopy are among the most powerful approaches to investigate non-equilibrium structural dynamics in excited matter. In this article, we discuss recent advances in ultrafast electron imaging enabled by significant improvements in the coherence of pulsed electron beams. Specifically, we review the development and first application of Ultrafast Low-Energy Electron Diffraction (ULEED) for the study of structural dynamics at surfaces, and discuss novel opportunities of Ultrafast Transmission Electron Microscopy (UTEM) facilitated by laser-triggered field emission sources. These and further developments will render coherent electron beams an essential component in the future of ultrafast nanoscale imaging.
References in corpus (21)
- Topological Insulators
- Cavity Optomechanics
- Optomechanical Crystals
- Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
- A Femtosecond Nanometer Free Electron Source
- Ultrafast transmission electron microscopy using a laser-driven field emitter: femtosecond resolution with a high coherence electron beam
- Attosecond Electron Pulse Trains and Quantum State Reconstruction in Ultrafast Transmission Electron Microscopy
- New electron source concept for single-shot sub-100 fs electron diffraction in the 100 keV range
- Momentum-dependent snapshots of a melting charge density wave
- Ultrafast and Nanoscale Plasmonic Phenomena in Exfoliated Graphene Revealed by Infrared Pump-Probe Nanoscopy
- Phase-ordering of charge density waves traced by ultrafast low-energy electron diffraction
- Laser-induced ultrafast electron emission from a field emission tip
- Ramsey-type phase control of free electron beams
- Highly coherent electron beam from a laser-triggered tungsten needle tip
- Ultrafast doublon dynamics in photo-excited 1T-TaS
- Femtosecond electrons probing currents and atomic structure in nanomaterials
- Ultrafast mid-infrared nanoscopy of strained vanadium dioxide nanobeams
- Watching the birth of a charge density wave order: diffraction study on nanometer-and picosecond-scales
- Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit
- Nanoscale diffractive probing of strain dynamics in ultrafast transmission electron microscopy
- High quality ultrafast transmission electron microscopy using resonant microwave cavities