Open AccessО доминирующем механизме безызлучательного возбуждения ионов марганца в II-VI полумагнитных полупроводниках
Author(s) -
А.В. Черненко
Publication year - 2020
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2020.04.49141.9273
Subject(s) - photoluminescence , ion , dipole , quenching (fluorescence) , atomic physics , magnetic dipole , semiconductor , excitation , chemistry , plasmon , quantum dot , crystal (programming language) , exchange interaction , doping , radiative transfer , electron transfer , condensed matter physics , materials science , fluorescence , physics , ferromagnetism , photochemistry , optoelectronics , optics , organic chemistry , quantum mechanics , computer science , programming language
Doping of group II-VI semiconductors and low-dimensional structures based on them with manganese leads to effective quenching of electro-and photoluminescence provided that the electron excitation energy of the crystal exceeds the energy of the intracenter transition of Mn2+ EMn и 2.1 eV. Quenching involves efficient energy transfer from the photoexcited crystal to Mn2 + ions. There are three possible mechanisms of this non-radiative energy transfer: dipole-dipole, exchange and related mechanism associated with sp-d mixing. Although the dipole-dipole mechanism is thought to be ineffective due to the forbidden intracenter transition in Mn2+, and the spin-dependent exchange mechanism is dominant, not all experimental facts accumulated to date supports this conclusion. The article discusses two experimental approaches to identify the dominant mechanism of energy transfer to Mn2 + ions and to evaluate the partial contributions of the mechanisms. One of these approaches is related to optically detectable magnetic resonance at single diluted magnetic semiconductor quantum dots (QD), the second - to plasmon amplification of energy transfer to Mn2 + ions by means of dipole-dipole interaction.