cross-relaxation
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

If a photon of the proper energy is incident on an ion or a molecule that is already in an excited state, the ion or molecule may be stimulated to emit a photon in the same direction as the incident photon. This process, called stimulated emission, is used in the operation of lasers and optical amplifiers.

Stimulated emission differs from spontaneous emission (fluorescence). Spontaneous emission does not require a stimulating photon and the light from spontaneous emission can be emitted in any direction and with a time constant that depends on the properties of the ion.

See also: Fluorescence, STED microscopy.

SimphoSOFT® supports simulation of stimulated emission

App Notes

	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 e-mail phone: +1 (973) 621-2340
	You can request a remote evaluation of our software by filling out online form -- no questions asked to get it, no need to install it on your computer.