stimulated emission 

https://doi.org/10.1351/goldbook.S06015
That part of the emission which is induced by a resonant perturbing electromagnetic field. The transition between states, n and m, is governed by the einstein coefficient of stimulated emission, Bnm. CIDNP emission and lasing action are examples of processes which require stimulated emission.
See also: spontaneous emission
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2279 [Terms] [Paper]
Citation: 'stimulated emission' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S06015 RIS BibTex EndNote
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Last revised: February 24, 2014