Ultrafast electron diffraction from nanophotonic waveforms via dynamical Aharonov-Bohm phases.

Area of Science:

• Condensed Matter Physics
• Quantum Optics
• Materials Science

Background:

• Electron interferometry offers subatomic precision for visualizing static fields.
• Understanding light-matter interactions necessitates time-resolved electromagnetic field analysis.
• Existing methods lack the required temporal resolution to capture ultrafast dynamics.

Purpose of the Study:

• To develop a method for capturing dynamic electromagnetic potentials with high time resolution.
• To investigate the electromagnetic origins of light-matter interactions at the quantum level.
• To demonstrate sub-light-cycle temporal resolution in electron diffraction experiments.

Main Methods:

• Utilized pump-probe electron diffraction with all-optically compressed electron pulses.
• Employed centrosymmetry-violating Bragg spot dynamics to detect field oscillations.
• Measured quantum mechanical phase shifts induced by oscillating electromagnetic potentials.

Main Results:

• Achieved sub-light-cycle time resolution in capturing dynamic electromagnetic potentials.
• Observed significant quantum mechanical phase shifts in electron de Broglie waves within 1 femtosecond.
• Demonstrated the ability to visualize ultrafast electromagnetic field dynamics in nanophotonic materials.

Conclusions:

• Pump-probe electron diffraction with compressed electron pulses enables ultrafast electromagnetic field imaging.
• This technique reveals the electromagnetic foundations of light-matter interactions at the cycle-of-light level.
• Coherent electron imaging and scattering are powerful tools for exploring quantum electrodynamics in materials.