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Above-threshold ionization

In atomic, molecular, and optical physics, above-threshold ionization (ATI) is a multi-photon effect where an atom is ionized with more than the energetically required number of photons. It was first observed in 1979 by Pierre Agostini and colleagues in xenon gas.

Photoelectrons, Features from ultrashort pulses & Structure

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Photoelectrons

PhotoelectronIonization energy
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Features from ultrashort pulses

Ultrashort pulsePhotoelectron spectrum
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Structure

Ponderomotive energy
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Overview

Atomic, molecular, and optical physicsMulti-photonPhotonsPierre AgostiniXenon
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Photoelectrons

Structure

Features from ultrashort pulses

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Above-threshold ionization

Nodes15
Edges14
Triples0
Avg. degree1.87
Density0.133333
Components1

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Important terminology

photons ionization ati energy number photoelectron peaks absorbed first features ultrashort multi-photon xenon minimal additional displaystyle electron peak corresponding photon

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