Terahertz control and timing correlations in a transmission electron microscope

Area of Science:

• Ultrafast electron microscopy
• Quantum dynamics
• Laser-matter interactions

Background:

• Ultrafast electron microscopy (UEM) offers high spatial resolution for observing material dynamics.
• Current UEM temporal resolution limits the observation of fundamental atomic and electron motions.
• Resolving ultrafast electron dynamics requires advanced temporal control and characterization techniques.

Purpose of the Study:

• To develop all-optical methods for controlling and compressing electron pulses in a transmission electron microscope.
• To achieve femtosecond-level temporal resolution in electron microscopy.
• To investigate multi-electron dynamics and quantum correlations in the time domain.

Main Methods:

• All-optical control of electron pulses using single optical cycles of laser-generated terahertz light.
• Electron pulse compression and characterization within a transmission electron microscope.
• Investigation of two-electron and three-electron states and their temporal correlations.

Main Results:

• Demonstrated all-optical control and compression of electron pulses to single-cycle terahertz duration.
• Merged the high spatial resolution of transmission electron microscopy with femtosecond temporal resolution.
• Observed substantial two-electron and three-electron anticorrelations in the time domain.

Conclusions:

• The developed technique enables unprecedented temporal resolution in electron microscopy.
• This advancement allows for the simultaneous visualization of atomic and electronic motions.
• Opens new avenues for studying quantum correlations in fundamental space-time dimensions.