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Crystals
Special Issues
Structural and Spectroscopic Studies of Rare Earth Doped Crystals
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Structural and Spectroscopic Studies of Rare Earth Doped Crystals

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (20 April 2023) | Viewed by 6575

Special Issue Editors

Dr. Elena Volkova

E-Mail Website
Guest Editor
Department of Crystallography and Crystal Chemistry, Lomonosov Moscow State University, Moscow, Russia
Interests: crystal growth; liquid-phase epitaxy; glassy materials; crystal structure; borates; tantalates; new materials for non-linear and laser applications
Dr. Elena Dobretsova

E-Mail Website
Guest Editor
Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
Interests: rare-earth ions; solid state; Stark energy levels; electron transitions; optical spectroscopy; Raman spectroscopy; vibrational spectroscopy; luminescence; laser materials; laser cooling
Prof. Dr. Rui M. Almeida

E-Mail Website
Guest Editor
Departamento de Engenharia Química/CQE, Instituto Superior Técnico/UL, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Interests: sol-gel films; photonic materials; photonic crystals; rare-earth luminescence; solid state lighting; frequency conversion; glass structure; glass crystallization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent decades, rare-earth (RE) dopants have played a crucial role in the development of functional materials, and have been used in the materials to improve their properties and expand their applications. RE compounds exhibit a wide variety of optical, luminescent, magnetic, and multiferroic properties. They are promising candidates for optical signal processing, lasing, optical quantum technologies, quantum nanophotonics, free-space optical communication, bioimaging, laser cooling. However, the interplay between their structural and spectroscopic characteristics is still under debate. The Special Issue "Structural and Spectroscopic Studies of Rare Earth Doped Crystals" is concerned with some key problems selected from a wide range of structural and spectroscopic studies of RE-activated solids, including both crystalline and glassy materials. This issue may become status reports summarizing the progress achieved in the last five years.

In this Special Issue, studies addressing or related to the following topics are welcome:

  • synthesis and growth of rare-earth doped crystals and glassy materials;
  • characterisation of rare-earth doped materials using spectroscopic, microscopic, XRD, and other advanced techniques;
  • analysis of the energy transfer processes;
  • upconversion efficiency;
  • new host materials for efficient emission.

Dr. Elena Volkova
Dr. Elena Dobretsova
Prof. Dr. Rui M. Almeida
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rare-earth ions
  • optical spectroscopy
  • crystal growth
  • single crystals
  • glass ceramics
  • solid state
  • Stark energy levels
  • electron transitions
  • Raman spectroscopy
  • vibrational spectroscopy
  • luminescence
  • laser cooling
  • magnetic properties

Published Papers (4 papers)

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Research

11 pages, 5821 KiB  
Article
Growth of Sesquioxide Crystals from Tungsten Crucibles by Vertical Gradient Freezing Method
by Evgeny Galenin, Viktoriia Galenina, Iaroslav Gerasymov, Daniil Kurtsev, Serhii Tkachenko, Pavlo Arhipov, Sofiia Sadivnycha, Vadim Alekseev, Anna Shaposhnyk, Ianina Boiaryntseva, Vira Niestierkina, Sandra Witkiewicz-Łukaszek, Yuriy Zorenko and Oleg Sidletskiy
Crystals 2023, 13(4), 591; https://doi.org/10.3390/cryst13040591 - 31 Mar 2023
Cited by 1 | Viewed by 1219
Abstract
Sesquioxides of lanthanides, yttrium, and scandium are promising hosts for laser and scintillation materials; however, the crystallization of such compounds is complicated by very high melting temperatures, as well as polymorph transitions. This work reports for the first time the growth of Y [...] Read more.
Sesquioxides of lanthanides, yttrium, and scandium are promising hosts for laser and scintillation materials; however, the crystallization of such compounds is complicated by very high melting temperatures, as well as polymorph transitions. This work reports for the first time the growth of Y2O3 and Y2−xScxO3 crystals by the Vertical Gradient Freezing method from tungsten crucibles, proposing an alternative to extremely expensive rhenium and iridium crucibles. Translucent Y2O3 samples are obtained, and their luminescent and scintillation parameters are evaluated. The main issues of Y2O3 crystallization under the proposed conditions are discussed, as well as ways of enhancing the crystal quality. Finally, polymorph transitions are avoided by decreasing the average radius of the rare earth cation by Y3+/Sc3+ substitution, providing transparent Y2−xScxO3 crystals with a cubic structure. Full article
(This article belongs to the Special Issue Structural and Spectroscopic Studies of Rare Earth Doped Crystals)
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8 pages, 1119 KiB  
Article
Structural and Spectroscopic Features of the Bixbyite-Type Yttrium Scandate Doped by Rare-Earth Ions
by Elena Dobretsova, Olimkhon Alimov, Denis Guryev, Valery Voronov, Sergey Rusanov, Vitaly Kashin, Sergey Kutovoy, Viktor Vlasov, Lubov Badyanova, Ivan Novikov and Vladimir Tsvetkov
Crystals 2022, 12(12), 1745; https://doi.org/10.3390/cryst12121745 - 02 Dec 2022
Cited by 3 | Viewed by 1449
Abstract
Yttrium scandate crystal fiber has been obtained through laser-heated pedestal growth. The crystal belongs to a bixbyite crystal structure and crystallizes in Ia3¯ space group. X-ray diffraction method shows a lattice parameter of a = 10.228(1) Å. Factor-group analysis of YScO [...] Read more.
Yttrium scandate crystal fiber has been obtained through laser-heated pedestal growth. The crystal belongs to a bixbyite crystal structure and crystallizes in Ia3¯ space group. X-ray diffraction method shows a lattice parameter of a = 10.228(1) Å. Factor-group analysis of YScO3 Raman spectra points to high degree of disorder in crystal structure of the new compound. Spectral-kinetic investigation of the crystal fibers doped by rare-earth ions points to the presence of two independent active optical centers of rare-earth ions. Moreover, the character of rare-earth impurities’ distribution is independent on a rare-earth ionic radius size. Full article
(This article belongs to the Special Issue Structural and Spectroscopic Studies of Rare Earth Doped Crystals)
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11 pages, 3665 KiB  
Article
Growth and Spectroscopy of Yb:YMgB5O10 Crystal
by Konstantin N. Gorbachenya, Anatol S. Yasukevich, Andrey I. Lazarchuk, Victor E. Kisel, Nikolay V. Kuleshov, Elena A. Volkova, Victor V. Maltsev, Elizaveta V. Koporulina, Vasiliy O. Yapaskurt, Nikolai N. Kuzmin, Dmitry A. Ksenofontov, Diana D. Mitina and Anna I. Jiliaeva
Crystals 2022, 12(7), 986; https://doi.org/10.3390/cryst12070986 - 15 Jul 2022
Cited by 2 | Viewed by 1603
Abstract
A transparent Yb:YMgB5O10 single crystal with dimensions up to 25 × 23 × 25 mm and weight 10.337 g was grown using a high-temperature solution growth on dipped seeds technique with a K2Mo3O10 solvent. The [...] Read more.
A transparent Yb:YMgB5O10 single crystal with dimensions up to 25 × 23 × 25 mm and weight 10.337 g was grown using a high-temperature solution growth on dipped seeds technique with a K2Mo3O10 solvent. The Yb3+ concentration was calculated to be 4.7 at.% (NYb = 3.71 × 1020 atoms/cm3) with a distribution coefficient Kd of 0.59. The grown crystal was characterized by means of PXRD, TGA-DSC and ATR-FTIR techniques. The spectroscopic characteristics of the Yb:YMgB5O10 crystal were demonstrated. Absorption cross-section spectra were produced. The luminescence spectra of the Yb:YMgB5O10 crystal were measured in the spectral range of 950–1100 nm. The luminescence kinetics of the 2F5/2 energy level were investigated and the lifetime was determined. Full article
(This article belongs to the Special Issue Structural and Spectroscopic Studies of Rare Earth Doped Crystals)
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13 pages, 4021 KiB  
Article
Synthesis and Laser-Related Spectroscopy of Er:Y2O3 Optical Ceramics as a Gain Medium for In-Band-Pumped 1.6 µm Lasers
by Konstantin N. Gorbachenya, Anatol S. Yasukevich, Viktor E. Kisel, Kirill V. Lopukhin, Vladimir V. Balashov, Alexander V. Fedin, Miron N. Gerke, Elena A. Volkova, Vasiliy O. Yapaskurt, Nikolay N. Kuzmin, Dmitry A. Ksenofontov, Dmitry V. Korost and Nikolay V. Kuleshov
Crystals 2022, 12(4), 519; https://doi.org/10.3390/cryst12040519 - 08 Apr 2022
Cited by 1 | Viewed by 1617
Abstract
In this paper, Er:Y2O3 optical ceramics were fabricated and details of the synthesis were presented. The spectral–luminescent properties of Er3+:Y2O3 optical ceramics were investigated. The absorption and emission cross-section spectra were determined. The luminescence kinetics [...] Read more.
In this paper, Er:Y2O3 optical ceramics were fabricated and details of the synthesis were presented. The spectral–luminescent properties of Er3+:Y2O3 optical ceramics were investigated. The absorption and emission cross-section spectra were determined. The luminescence kinetics at near 1.6 µm was single exponential and the lifetime of erbium 4I13/2 energy level was determined. In the frame of the conventional Judd–Ofelt theory, the emission properties of the energy levels of erbium 4I13/2 and 4I11/2 involved in laser operation at near 1.6 µm were calculated. The gain coefficient curves for typical values of the relative population of the upper laser level 4I13/2 were presented. The composition and structure were studied using the SEM, XRD, FTIR spectroscopy, and X-ray computer tomography techniques. Full article
(This article belongs to the Special Issue Structural and Spectroscopic Studies of Rare Earth Doped Crystals)
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