Resonant excitation of infra-red emission in GaN:(Mn,Mg)

Abstract

By combining experimental photoluminescence excitation spectroscopy and calculations based on density functional theory and many-body Green's functions, the most efficient excitation channels of infra-red (IR) emission from Mn-Mg${}_k$ paramagnetic complexes stabilized in GaN:(Mn,Mg) are here identified. Moreover, a Tanabe-Sugano energy diagram for 3$d^2$Mn${}^{5+}$ is reconstructed and Mn-Mg${}_3$ are singled out as the predominant configurations responsible for the IR emission. The correlation of intensity of the individual emission lines as a function of temperature and excitation energy, allows assigning them to well defined and specific optical transitions.

arXiv comment17 pages, 6 figures, 45 references

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