Optical investigation of the OH<sup>−</sup> groups in the LiNbO<sub>3</sub> doped by copper

Sugak, D.; Yakhnevych, U.; Syvorotka, I.I.; Buryy, Oleh; Попов, А. И.; Ubizskii, S.

doi:10.1080/10584587.2019.1591981

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…[46] The number of positions that a hydrogen atom can occupy when bonding with oxygen through a hydrogen bond depends on the stoichiometry (Li/ Nb), the type and concentration of the dopant and the obtaining technology. [4,[47][48][49] The presence of complex defects involving hydrogen bonds in the structure of the LiNbO 3 crystal can lead to a change in the probability of radiative recombination of hole and electron polarons in the near-IR region of the spectrum.…”

Section: Photoluminescence Spectramentioning

confidence: 99%

“…[3] In addition to point defects Nb Li , V Li , etc., complex defects associated with the localization of hydrogen in the structure of LN are formed, when the crystal is grown in an air atmosphere. [4] At the same time, hydroxyl groups play an important role in the creation of holographic and photonic devices, planar waveguides based on LN. [5,6] Close packing of oxygen atoms serves as the basis of the structure of the LN ferroelectric phase (R3c).…”

Section: Introductionmentioning

confidence: 99%

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Structure and Luminescent Properties of Double‐Doped LiNbO₃:Zn:Mg Crystals

Tokko,

Kadetova,

Prusskii

et al. 2024

Physica Status Solidi (a)

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The correlation between photoluminescence in the near‐IR region and point defect centers in the LiNbO3 crystals co‐doped with Zn and Mg both by homogeneous and direct methods has been studied. X‐ray diffraction (XRD) analysis shows that the LiNbO3:Zn:Mg (4.68:0.9 mol%) crystal obtained by homogeneous doping has the least number of intrinsic defects compared to the others. It has been established that ZnLi defects stimulate photoluminescence (PL) in the near‐IR region of the luminescence spectrum in the LiNbO3:Zn:Mg crystals obtained by homogeneous doping. The LiNbO3:Zn:Mg (4.68:0.90 mol%) crystal has the maximum PL intensity and the LiNbO3:Zn:Mg (3.83:0.97 mol%) crystal has the minimum. Both crystals are doped homogeneously. Such defects as niobium vacancies (VNb) and niobium in the empty octahedron (Nboct) are suggested as luminescence quenchers in the co‐doped crystals.

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Section: Photoluminescence Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure and Luminescent Properties of Double‐Doped LiNbO₃:Zn:Mg Crystals

Tokko,

Kadetova,

Prusskii

et al. 2024

Physica Status Solidi (a)

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“…At the same time, in papers in Refs. [11][12][13] authors propose to investigate the interdiffusion layers within lithium niobate and gadolinium gallium garnet in "parallel" geometry. In this case the probe of analytical instrument operates in the direction parallel to the surface (on the cross section of the epitaxial structure) through which the diffusion occurs and the probes scanning directory coincides with the direction of diffusion.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Interface of Y₃Fe₅O₁₂/Gd₃Ga₅O₁₂ Structure Obtained by the Liquid Phase Epitaxy

Syvorotka

Sugak

Yakhnevych

et al. 2022

Crystal Research and Technology

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The changes in the optical, structural, mechanical properties, and chemical composition of Y 3 Fe 5 O 12 /Gd 3 Ga 5 O 12 (YIG/GGG) single crystal structures grown by liquid phase epitaxy, particularly at the interface between the film (Y 3 Fe 5 O 12 ) and the substrate (Gd 3 Ga 5 O 12 ), are studied. Different complementary techniques, including optical microscopy, local spectrophotometry, electron probe microanalysis, micro-Raman spectroscopy, and nanohardness analysis are used. The main finding of the study is an experimental approach, in which the probe of the measuring device (light beam, electron beam, nanoindenter) is directed to the surface of the studied sample in a direction perpendicular to the direction of structure growth, and the surface is scanned along this direction. It allows to obtain the profiles of changes in refractive properties, nanohardness, optical absorption, chemical composition, and intensity of phonon spectrum bands at the transition from the GGG to YIG. It is established that the lengths of the scanning intervals, at which the changes of various properties of a specimen occur, differ significantly. The obtained results are affected by the size of the probes and by the sensitivities of both the particular measuring method and the particular physical property of the material to changes in the chemical composition and crystalline structure of the sample.

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