stimulated emission

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 Einsteincoefficient of stimulated emission, B n m. 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