Attosecond metrology in a continuous-beam transmission electron microscope

Area of Science:

• Physics
• Materials Science
• Chemistry

Background:

• Electron microscopy offers high spatial resolution for material structures.
• Investigating dynamic processes like light-matter interactions requires high temporal resolution.
• Current methods often lack the necessary time resolution to observe ultrafast phenomena.

Purpose of the Study:

• To develop a technique for achieving attosecond time resolution in electron microscopy.
• To enable visualization of light-matter interactions with unprecedented temporal precision.
• To modify existing electron microscopes for ultrafast imaging capabilities.

Main Methods:

• Utilizing optical cycles of a continuous-wave laser to bunch electrons.
• Generating electron pulses shorter than half a light cycle.
• Synchronizing electron pulses with optical cycles for precise timing.

Main Results:

• Achieved attosecond time resolution in electron microscopy.
• Electron pulses maintain high brightness synchronized with laser cycles.
• Demonstrated a simple modification applicable to most electron microscopes.

Conclusions:

• The developed method transforms conventional electron microscopes into attosecond instruments.
• This technique opens new avenues for studying atomic-level light-matter interactions.
• Enables visualization of dynamic processes driven by light at the atomic scale.