multi-photon absrorption

Multi-photon absorption is the simultaneous or consecutive absorption of two or more photons by an atom, molecule or ion. Examples of simultaneous multi-photon absorption are two-photon absorption (TPA) and three-photon absorption (3PA) from ground states to excited states via virtual intermediate states.

An example of consecutive multi-photon absorptions is first the absorption of a photon that promotes an electron from the ground state to the first excited state of the atom, molecule or ion followed a short time later by the absorption of a photon (excited state absorption or ESA) that promotes the electron from the first excited state to the second excited state.


See also: Single-photon absorption, Two-photon absorption, Three-photon absorption.





SimphoSOFT logo SimphoSOFT® supports modeling multi-photon (up to three photons) absorption. Its mathematical model includes a variant of PROP equation, written in the terms of electromagnetic field, coupled with time-resolved radially-dependent RATE equations. App Notes SimphoSOFT logo


SimphoSOFT® can be purchased as a single program and can be also configured with Energy Transfer add-on ET add-on, Multi-Beam add-on Multi-beam add-on, Optimization add-on Optimization add-on, Z-scan add-on Z-scan add-on, and MPA Info+ add-on MPA Info+ add-on for an additional charge. Please, contact our sales staff for more information
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