Optical Absorption and Luminescence of Gd_{3}Ga_{5}O_{12}:Cr,Mg Epitaxial Films

• Authors: Ya. Zakharko , I. Syvorotka , A. Luchechko , I. Syvorotka , D. Sugak , M. Vakiv
• Languages of publication: EN

Abstracts

EN

The optical absorption, emission spectra and luminescence decay kinetics under photoexcitation of Gd_{3}Ga_{5}O_{12} (GGG) garnet epitaxial films doped with Cr^{3+} ions and co-doped with Cr^{3+} and Mg^{2+} ions have been investigated. Luminescence of the GGG:Cr films due to ^{4}T_{2} → ^{4}A_{2} and ^{2}E → ^{4}A_{2} transitions in Cr^{3+} ions have been observed. Increase of the activator ions concentration has an influence on the intensity and decay time of Cr^{3+} ions photoluminescence. Introduction of the magnesium ions leads to partial transformation of chromium valence state (Cr^{3+} → Cr^{4+}) and to the appearance of a broad absorption band with the maximum at 860 nm. The narrow lines with luminescence maxima at 704 and 706 nm have arisen in the highly doped GGG:Cr,Mg films.

Keywords

EN

61.72.sd; 78.20.-e; 78.55.Hx

Discipline

• 61.72.sd: Impurity concentration
• 78.20.-e: Optical properties of bulk materials and thin films(for optical properties related to materials treatment, see 81.40.Tv; for optical materials, see 42.70-a; for optical properties of superconductors, see 74.25.Gz; for optical properties of rocks and minerals, see 91.60.Mk; for optical properties of specific thin films, see 78.66.-w)
• 78.55.Hx: Other solid inorganic materials

• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 1
• Pages: 111-113

Dates

published

2010-01

Contributors

author

Ya. Zakharko

• Faculty of Electronics, Ivan Franko National University of Lviv, 107 Tarnavskogo St., Lviv 79017, Ukraine

author

I. Syvorotka

• Institute for Materials, SRC "Carat", 202 Stryjska St., Lviv 79031, Ukraine

author

A. Luchechko

• Faculty of Electronics, Ivan Franko National University of Lviv, 107 Tarnavskogo St., Lviv 79017, Ukraine

author

I. Syvorotka

• Institute for Materials, SRC "Carat", 202 Stryjska St., Lviv 79031, Ukraine

author

D. Sugak

• Institute for Materials, SRC "Carat", 202 Stryjska St., Lviv 79031, Ukraine
• Lviv Polytechnic National University, 12 Bandera St., 79646 Lviv, Ukraine

author

M. Vakiv

• Institute for Materials, SRC "Carat", 202 Stryjska St., Lviv 79031, Ukraine

References

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Identifiers

DOI

10.12693/APhysPolA.117.111