Laser recording of color voxels in lithium fluoride

Мартынович, Е. Ф.; Chernova, E.O.; Dresvyansky, V. P.; Bugrov, A. É.; Kostryukov, P. V.; Konyashchenko, A. V.

doi:10.1016/j.optlastec.2020.106430

Cited by 14 publications

(3 citation statements)

References 37 publications

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“…Visible photoluminescence of radiation-induced color centers in LiF crystals.-Among alkali halides containing CCs, LiF has been receiving great attention due to the peculiar optical properties of the material and to the high emission efficiency of radiationinduced aggregate CCs, suitable for the realization of tunable lasers operating at RT 45 and of photonics components 46 and devices. 47,48 LiF possesses the largest band gap, greater than 14 eV, of any solid in natural form. Its high optical transparency is particularly suitable for the investigation of lattice-defect spectral features by optical spectroscopy, which have been studied extensively since 1960s 2 .…”

Section: Luminescence and Radiation Detectorsmentioning

confidence: 99%

Radiophotoluminescence of Color Centers in Lithium Fluoride for Novel Radiation Detectors in Proton-Beam Diagnostics and Clinical Dosimetry

Montereali

Nichelatti

Piccinini

et al. 2021

ECS J. Solid State Sci. Technol.

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The peculiar photoluminescence properties of radiation-induced electronic defects in lithium fluoride (LiF), known as color centers, are well known for applications in tunable lasers and photonic light-emitting microdevices operating at room temperature. In the last two decades they have been under exploitation in radiation imaging detectors and dosimeters based on the optical reading of the visible photoluminescence in LiF crystals and polycrystalline thin films. They were proposed for soft X-ray imaging at high spatial resolution and, more recently, their use has been successfully applied to advanced diagnostics of proton beams. After proton irradiation of LiF, the emission intensity of the radiation-induced point defects is proportional to the absorbed dose over several orders of magnitude, thus novel solid-state dosimeters with imaging capabilities can be envisaged, although dose values that are typical of clinical radiotherapy are still a challenge. In this brief review, the main experimental results and recent advances concerning radiophotoluminescence of color centers in optically transparent LiF crystals and polycrystalline thin films are presented and discussed in order to highlight the advantages, challenges and limits related to the feasibility of detectors for protontherapy applications.

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Section: Luminescence and Radiation Detectorsmentioning

confidence: 99%

Radiophotoluminescence of Color Centers in Lithium Fluoride for Novel Radiation Detectors in Proton-Beam Diagnostics and Clinical Dosimetry

Montereali

Nichelatti

Piccinini

et al. 2021

ECS J. Solid State Sci. Technol.

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“…Это особенно подчеркивается практическим значением радиационных дефектов, включая центры окраски, как модельных квантовых систем в различных фундаментальных исследованиях. Кроме того, центры окраски в различных кристаллах широко используются в качестве рабочих центров детекторов гамма-излучения, трековых детекторов заряженных частиц [4], оптических носителей визуальной и цифровой информации [5], лазерных сред и пассивных лазерных затворов [6,7], тонкопленочных люминесцентных экранов для визуализации рентгеновских микроизображений [8] и т. д. В последние годы лавинообразно растет интерес к спектроскопии одиночных люминесцирующих центров, являющихся идеальной основой элементной базы квантовой информатики и наносенсорики [9][10][11]. Поэтому изучение единичных радиационных дефектов микроспектроскопическими методами [12,13], развиваемыми в данной работе, несомненно расширит возможности их дальнейшего практического использования.…”

Section: Introductionunclassified

Микроспектроскопия Единичных Центров Окраски В Щелочно-Галоидных Кристаллах

Мартынович¹,

Зилов²,

Дресвянский³

2023

Оптика И Спектроскопия

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Single color centers in the LiF crystal were studied by confocal fluorescence microscopy with analysis and statistical processing of the time dependences of their fluorescence intensity. The possibility of identifying quantum systems whose selection by luminescence excitation (absorption) spectra, luminescence spectra, and luminescence decay time is difficult due to their overlap or due to the coincidence of the corresponding characteristics of different centers is shown. An additional identification feature in this case is the flicker frequency and other characteristics of the time dependences of the luminescence intensity. The efficiency of the method is demonstrated by the example of two color centers of different nature (F2 and F3, stabilized by an impurity–vacancy dipole) in a lithium fluoride crystal.

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“…Под действием различных источников ионизирующего излучения в кристаллах фторида лития эффективно создаются агрегатные F-, F 2 -, F + 2 -, F 3 -, F + 3 -, F 4 -, F + 4 -центры окраски (ЦО), а также образуются центры, ассоциированные с примесными дефектами, всегда содержащихся в кристаллах. Они являющихся рабочими квантовыми системами для создания перестраиваемых лазеров [2], пассивных лазерных затворов [3], а также в качестве объемных запоминающих оптических сред [4].…”

Section: Introductionunclassified

Флуктуирующая Флуоресценция Одиночных Центров Окраски В Кристаллах Фторида Лития

Дресвянский¹,

Зилов²,

Мартынович³

2022

Оптика И Спектроскопия

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Single F2 and F3+- color centers in the LiF crystal were studied by confocal fluorescence microscopy. The time dependences of their fluorescence intensity were analyzed and statistically processed. Our studies show that, the F3+- color center, being photoexcited, is able enter the triplet state, while in ground (singlet) state it changes orientation with a frequency of 1.5 – 2 Hz at room temperature, due to reorientational diffusion, unlike the F2- center, which is reoriented only being in the triplet state. This subtype of rotational diffusion of the center does not lead to its translational diffusion.

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Laser recording of color voxels in lithium fluoride

Cited by 14 publications

References 37 publications

Radiophotoluminescence of Color Centers in Lithium Fluoride for Novel Radiation Detectors in Proton-Beam Diagnostics and Clinical Dosimetry

Radiophotoluminescence of Color Centers in Lithium Fluoride for Novel Radiation Detectors in Proton-Beam Diagnostics and Clinical Dosimetry

Микроспектроскопия Единичных Центров Окраски В Щелочно-Галоидных Кристаллах

Флуктуирующая Флуоресценция Одиночных Центров Окраски В Кристаллах Фторида Лития

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