Luminescence of GeO2 glass, rutile-like and α-quartz-like crystals

Trukhin, A.N.; Kink, M.; Maksimov, Yuri; Jansons, J.; Kink, R.

doi:10.1016/j.jnoncrysol.2005.11.027

Cited by 25 publications

(30 citation statements)

References 20 publications

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“…These localized states of silica glass are connected with oxygen deficient center of luminescence and are likely affiliated with structural motifs different from tetrahedral, because the corresponding oxygen deficient center of this luminescence as never been observed in a-quartz crystals, whereas it has been observed in silicon dioxide crystals with rutile structure (stishovite) [6]. The analogous situation is observed in germanium dioxide glasses and rutile-like GeO 2 crystals [7]. Oxygen deficiency in tetrahedral structures provides precursors of the E 0 -centers [8].…”

Section: Introductionmentioning

confidence: 75%

Photosensitivity of SiO2–Al and SiO2–Na glasses under ArF (193nm) laser

Trukhin

Teteris

Fedotov

et al. 2009

Journal of Non-Crystalline Solids

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Section: Introductionmentioning

confidence: 75%

Photosensitivity of SiO2–Al and SiO2–Na glasses under ArF (193nm) laser

Trukhin

Teteris

Fedotov

et al. 2009

Journal of Non-Crystalline Solids

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“…A question stands, if germania crystal with rutile structure possesses analogous singlet-singlet luminescence unperturbed with sodium defect. Such a band was found under ArF laser excitation in such crystal [26] and its spectra are presented in Fig. 15.…”

Section: Luminescence Of Rutile-structured Geo 2 Crystal Comparison mentioning

confidence: 81%

“…15. Certainly, a laser excitation photon falls down deeply in the intrinsic absorption range and it also provides recombination luminescence with slow decay [26].…”

Section: Luminescence Of Rutile-structured Geo 2 Crystal Comparison mentioning

confidence: 99%

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Luminescence of SiO2 and GeO2 crystals with rutile structure. Comparison with α-quartz crystals and relevant glasses (Review Article)

Trukhin¹

2016

Low Temperature Physics

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Luminescence properties of SiO 2 in different structural states are compared. Similar comparison is made for GeO 2 . Rutile and α-quartz structures as well as glassy state of these materials are considered. Main results are that for α-quartz crystals the luminescence of self-trapped exciton is the general phenomenon that is absent in the crystal with rutile structure. In rutile structured SiO 2 (stishovite) and GeO 2 (argutite) the main luminescence is due to a host material defect existing in as-received (as-grown) samples. The defect luminescence possesses specific two bands, one of which has a slow decay (for SiO 2 in the blue and for GeO 2 , in green range) and another, a fast ultraviolet (UV) band (4.75 eV in SiO 2 and at 3 eV in GeO 2 ). In silica and germania glasses, the luminescence of self-trapped exciton coexists with defect luminescence. The latter also contains two bands: one in the visible range and another in the UV range. The defect luminescence of glasses was studied in details during last 60-70 years and is ascribed to oxygen deficient defects. Analogous defect luminescence in the corresponding pure nonirradiated crystals with α-quartz structure is absent. Only irradiation of a α-quartz crystal by energetic electron beam, γ-rays and neutrons provides defect luminescence analogous to glasses and crystals with rutile structure. Therefore, in glassy state the structure containing tetrahedron motifs is responsible for existence of self-trapped excitons and defects in octahedral motifs are responsible for oxygen deficient defects. PACS

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“…15 [24]. A difference is observed in decay kinetics: Good exponential in the crystal case but non-exponential in the glass case.…”

Section: Luminescence Of Germanate Glasses Germania Crystals With Rutmentioning

confidence: 99%