Laser-Matter Interactions and Applications

When an intense laser pulse strikes an atom or molecule, it can strip away electrons, drive them back into the parent ion, and release bursts of light lasting only a few hundred attoseconds — roughly a billionth of a billionth of a second. Researchers working at this frontier use those ultrashort pulses, along with techniques like high-harmonic generation and X-ray spectroscopy, to watch electrons and chemical bonds move in real time, at the natural timescale of quantum mechanics. A central challenge is learning not just to observe these dynamics but to control them — steering electrons through molecules or steering reactions toward desired outcomes using carefully shaped laser fields. Open questions include how quantum coherence survives in complex, many-electron systems under intense illumination, and how to push pulse durations and photon energies far enough to image molecular structure as it changes during a chemical reaction.

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Keywords

Attosecond PhysicsHigh-Harmonic GenerationUltrafast Laser PulsesNonlinear OpticsMolecular DynamicsQuantum Control