TERMIUM Plus®

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STIMULATED EMISSION [2 records]

Record 1 2015-04-13

English

Subject field(s)
  • Electromagnetic Radiation
  • Atomic Physics
  • Optics
CONT

[There are] three simple interactions of photons with matter - absorption, spontaneous emission, and stimulated emission ...

CONT

Stimulated emission. An excited atom is stimulated to emit a photon when hit by another photon. As a result, two photons leave the atom.

CONT

... these two photons would leave together, traveling in the same direction and exactly in phase with each other ... this process of stimulated emission, in which one photon comes in and two go out, contains the seed of a method for amplifying light waves.

OBS

... stimulated emission ... is the converse of absorption ...

French

Domaine(s)
  • Rayonnements électromagnétiques
  • Physique atomique
  • Optique
CONT

[Il existe] trois types de transitions radiatives [:] [...] émission spontanée [...] absorption [...] émission induite (ou émission stimulée) [...]

CONT

Dans le processus stimulé, un photon [...] est envoyé à l'intérieur de S; il oblige un système s à se désexciter et repart accompagné d'un second photon qui a strictement mêmes caractéristiques que lui (polarisation, direction et fréquence); photons stimulateurs et stimulés sont cohérents entre eux. [...] l'émission stimulée [...] est à la base du fonctionnement des masers et des lasers.

OBS

L'émission stimulée est le mécanisme inverse de l'absorption.

Spanish

Save record 1

Record 2 1994-12-05

English

Subject field(s)
  • Lasers and Masers

French

Domaine(s)
  • Masers et lasers
DEF

Mécanisme inverse de l'absorption

Spanish

Save record 2

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