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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.