diffraction
electron transfer
electromagnetic field
energy level
energy level diagram
energy transfer and energy transfer with upconversion
excited state absorption
fluorescence
green fluorescent protein
Kerr effect
multi-photon absorption
nondegenerate two-photon absorption
nonlinear index of refraction
nonparaxial approximation
optically thick sample
paraxial approximation
phosphorescence
plane wave
photo-activated material
photodynamic therapy
pump probe experiment
quantum dots
relaxation
reversible saturable absorption
saturable absorption
self-quenching
single-photon absorption
slowly varying envelope approximation
split-step numerical method
STED microscopy
stimulated emission
three-photon absorption
two-photon absorption
upconversion
Z-scan
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.
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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 |  |
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SimphoSOFT® can be purchased as a single program and can be also configured with Energy Transfer add-on  , Multi-Beam add-on  , Optimization add-on  , Z-scan add-on  , and MPA Info+ add-on  for an additional charge. Please, contact our sales staff for more information
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