Sapphire: Relation between luminescence of starting materials and luminescence of single crystals

Mogilevsky, R.; Nedilko, S.; Sharafutdinova, Liudmila G.; Burlay, Sergii; Sherbatskii, V.; Boyko, Volodymyr; Mittl, Scott D.

doi:10.1016/j.optmat.2008.11.023

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…The luminescence spectra in this range have a complex shape and consist of several broad components associated with the excitation of intrinsic defects in sapphire -neutral oxygen vacancies (F-centers) and aggregate centers in various charge states (F 2 -, F + 2 -, F 2+ 2 -centers) [5][6][7]. It has been established [8,9] that, regardless of the methods of synthesis of α-Al 2 O 3 , it always has a lack of oxygen, which is confirmed by the presence of luminescence lines associated with oxygen vacancies, even in the initial sample (curve 1). A similar PL spectrum was also observed in the study [10] for single-crystalline α-Al 2 O 3 .…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence of sapphire irradiated by low-energy electrons and ions

E.Yu.

K.E.

A.A.

et al. 2022

Optics and Spectroscopy

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Photoluminescence (PL) of sapphire single crystals as received and preirradiated by low energy Ar+ ions and electrons has been studied to reveal a relationship between sapphire charging under electron beam irradiation and radiation-induced defect formation. The photoluminescence spectra were obtained using a confocal microscope excitation wavelength of 445 nm as well as by a nonconfocal method with excitation at a wavelength of 355 nm. The lines observed in PL spectra for all samples are associated with both intrinsic and impurity defects. It has been established that preliminary ion irradiation leads to disordering of the near-surface region of the sample resulting in a significant increase in the photoluminescence intensity. Preliminary electron irradiation can lead to a change in the charge state of defects that initially exist in the crystal. Keywords: radiation-stimulated defects, sapphire photoluminescence, ion and electron irradiation.

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Section: Resultsmentioning

confidence: 99%

Photoluminescence of sapphire irradiated by low-energy electrons and ions

E.Yu.

K.E.

A.A.

et al. 2022

Optics and Spectroscopy

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“…Спектры люминесценции в этом диапазоне имеют сложную форму и состоят из нескольких широких компонент, связанных с возбуждением собственных дефектов в сапфире -нейтральных кислородных вакансий (Fцентров) и агрегатных центров в различных зарядовых состояниях (F 2 -, F + 2 -, F 2+ 2 -центров) [5][6][7]. Установлено [8,9], что независимо от методов синтеза α-Al 2 O 3 в нем всегда имеется недостаток кислорода, что подтверждается наличием линий люминесценции, связанных с вакансиями кислорода, даже в исходном образце (кривая 1). Похожий спектр ФЛ также наблюдался в работе [10]…”

Section: образцы и методика экспериментаunclassified

Фотолюминисценция Сапфира, Облученного Электронами И Ионами Низких Энергий

Зыкова¹,

Озерова²,

Татаринцев³

et al. 2022

Оптика И Спектроскопия

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Photoluminescence (PL) of sapphire single crystals as received and preirradiated by low energy Ar+ ions and electrons has been studied to reveal a relationship between sapphire charging under electron beam irradiation and radiation-induced defect formation. The photoluminescence spectra were obtained using a confocal microscope wavelength of 445 nm as well as by a nonconfocal method with excitation at a wavelength of 355 nm. The lines observed in PL spectra for all samples are associated with both intrinsic and impurity defects. It has been established that preliminary ion irradiation leads to disordering of the near-surface region of the sample resulting in a significant increase in the photoluminescence intensity. Preliminary electron irradiation can lead to a change in the charge state of defects that initially exist in the crystal.

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“Polymer–Oxide” Micro-/Nanocomposites: Background and Promises

Nedilko

2018

Springer Proceedings in Physics

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Sapphire: Relation between luminescence of starting materials and luminescence of single crystals

Cited by 4 publications

References 9 publications

Photoluminescence of sapphire irradiated by low-energy electrons and ions

Photoluminescence of sapphire irradiated by low-energy electrons and ions

Фотолюминисценция Сапфира, Облученного Электронами И Ионами Низких Энергий

“Polymer–Oxide” Micro-/Nanocomposites: Background and Promises

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