Details

Autor(en) / Beteiligte

• Il'ichev, N.
• Sidorin, A.
• Gulyamova, E.
• Tumorin, V.
• Pashinin, P.
• Kalinushkin, V.
• Mironov, S.
• Gladilin, A.
• Gavrischuk, E.
• Chukichev, M.

Titel

Quenching effect of upper laser level lifetime of Fe2+ ions in ZnSe by free electrons

Ist Teil von

• Journal of luminescence, 2021-11, Vol.239, p.118363, Article 118363

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• We theoretically and experimentally examined the assumption that the lifetime excited state of Fe2+ in ZnSe:Fe crystal is quenched by free electrons. The effect of the electron beam current value on the temporal characteristics of the luminescence was studied. Three variants, including a sample in the electronic circuit in the case of Fe2+ ions luminescence excitation in a ZnSe:Fe crystal by a beam of accelerated electrons, were first considered theoretically. These variants differ in external electric field magnitude in the sample, which affects the concentration of free electrons in the excited region of the sample. Equations describing the time dependence of the sample's electron density were derived. The luminescence decay kinetics of Fe2+ ions in ZnSe:Fe crystal excited by electron pulse with different electron beam current values and short-pulse optical radiation were obtained. The values of the quantities that determine the temporal characteristics of the luminescence decay depending on the electron beam current were found. •Free electrons in conduction band quench the lifetime of 5T2 excited state of Fe2+ in ZnSe:Fe crystal due to Auger process.•The luminescence decay of Fe2+ ions in ZnSe:Fe crystal depends on electron beam current value.•The equations describing the dependence of electron density in the sample on time were derived.