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Updated: Jan 12, 2026
06:58
Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
Published on: July 12, 2016
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Terahertz-field-modified electron dynamics in above-threshold ionization
Optics Letters
|November 4, 2025
Summary
We demonstrate control over electron dynamics in argon using intense terahertz (THz) fields. The terahertz field
Area of Science:
- Quantum dynamics
- Ultrafast spectroscopy
- Atomic physics
Background:
- Above-threshold ionization (ATI) is a fundamental process in strong-field physics.
- Controlling electron dynamics with external fields is crucial for ultrafast science.
- Terahertz (THz) fields offer unique capabilities due to their long wavelengths and tunable electric fields.
Purpose of the Study:
- To experimentally demonstrate control of electron dynamics during ATI of argon.
- To investigate the influence of a single-cycle THz field on ATI spectra.
- To explore the potential for THz pulse characterization using ATI.
Main Methods:
- Experimental setup involving argon gas and synchronized near-infrared and THz pulses.
- Above-threshold ionization (ATI) measurements.
- Analysis using improved strong-field approximation and classical electron trajectory simulations.
Main Results:
- The vector potential of the THz field significantly influences ATI photoelectron energy spectra.
- Maximum photoelectron energy, ATI peak separation, and total electron yield are tunable by the THz field.
- Time delay between ionizing and THz pulses critically affects electron dynamics.
Conclusions:
- Precise control over electron dynamics in ATI is achievable with moderately strong single-cycle THz fields.
- ATI spectra serve as a sensitive probe for characterizing THz pulse properties.
- This work opens avenues for advanced THz field control and metrology.
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