Pub Date : 2023-01-01DOI: 10.21883/os.2023.07.56137.4950-23
Д.А. Кафеева, И. А. Гладских, Д.Р. Дададжанов, Анна Викторовна Афанасьева, Анастасия Алексеевна Сапунова, Н. А. Маслова, Т. А. Вартанян
The possibility of obtaining macroscale anisotropic thin films from polyvinyl alcohol with included metal nanorods under uniaxial tension under conditions that do not lead to a change in the morphology of metal nanoparticles is shown. Silver and gold nanorods were obtained by directed growth from nuclei and then embedded in a polymer matrix based on polyvinyl alcohol. Initially isotropic films with absorption independent of the polarization of the probing light became anisotropic after stretching, which manifested itself in the dependence of the extinction spectra on the polarization of the probing radiation. The weakening of the longitudinal dipole plasmon resonance mode with the simultaneous enhancement of the transverse dipole plasmon resonance when the light polarization is rotated from 0 to 90 degree indicates the orientation of the nanorods in the film along the direction of its stretching. In addition to the change in absorption in the bands of dipole modes, a strong orientational dependence of absorption in the band of the quadrupole mode of the plasmon resonance of metal nanorods was found.
{"title":"Оптическая анизотропия пленок из поливилового спирта с металлическими наностержнями при одноосном растяжении","authors":"Д.А. Кафеева, И. А. Гладских, Д.Р. Дададжанов, Анна Викторовна Афанасьева, Анастасия Алексеевна Сапунова, Н. А. Маслова, Т. А. Вартанян","doi":"10.21883/os.2023.07.56137.4950-23","DOIUrl":"https://doi.org/10.21883/os.2023.07.56137.4950-23","url":null,"abstract":"The possibility of obtaining macroscale anisotropic thin films from polyvinyl alcohol with included metal nanorods under uniaxial tension under conditions that do not lead to a change in the morphology of metal nanoparticles is shown. Silver and gold nanorods were obtained by directed growth from nuclei and then embedded in a polymer matrix based on polyvinyl alcohol. Initially isotropic films with absorption independent of the polarization of the probing light became anisotropic after stretching, which manifested itself in the dependence of the extinction spectra on the polarization of the probing radiation. The weakening of the longitudinal dipole plasmon resonance mode with the simultaneous enhancement of the transverse dipole plasmon resonance when the light polarization is rotated from 0 to 90 degree indicates the orientation of the nanorods in the film along the direction of its stretching. In addition to the change in absorption in the bands of dipole modes, a strong orientational dependence of absorption in the band of the quadrupole mode of the plasmon resonance of metal nanorods was found.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90775380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.04.55550.60-22
Фридрих С. Джепаров
The existing equilibrium statistical physics is based on application of standard quasiadditive integrals of motion, which include energy, momentum, rotation momentum, and number of particles. It is shown that this list is far from complete and that any quasiadditive dynamic variable can be mapped to corresponding quasiadditive integral of motion. As a result an ensemble with a given external pressure is constructed. It provides the first example of the distribution in which phonon populations depend on pressure differently than in the canonical Gibbs ensemble. Obtained results indicate the need to continue the studies of phonon populations based on Raman scattering, which were fulfilled earlier in LFTI and initiated this work.
{"title":"Нестандартные квазиаддитивные интегралы движения и зависимость фононных заселенностей от давления","authors":"Фридрих С. Джепаров","doi":"10.21883/os.2023.04.55550.60-22","DOIUrl":"https://doi.org/10.21883/os.2023.04.55550.60-22","url":null,"abstract":"The existing equilibrium statistical physics is based on application of standard quasiadditive integrals of motion, which include energy, momentum, rotation momentum, and number of particles. It is shown that this list is far from complete and that any quasiadditive dynamic variable can be mapped to corresponding quasiadditive integral of motion. As a result an ensemble with a given external pressure is constructed. It provides the first example of the distribution in which phonon populations depend on pressure differently than in the canonical Gibbs ensemble. Obtained results indicate the need to continue the studies of phonon populations based on Raman scattering, which were fulfilled earlier in LFTI and initiated this work.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76715324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.07.56133.4860-23
Алексей Иванович Сидоров, М.В. Махаева
The results of computer simulation of optical properties of one-dimensional (1D) photonic crystal (PC) with defect, based on the layers Si-SiO2 in near IR range are presented. The optical thicknesses of layers, which form PC, were λ/4, 3λ/4 and 10λ/4. Defect was formed by air gap in the middle of PC. The influence of defect thickness on spectral position of the transmission band of defect was studied. It was shown that the sensitivity on the defect thickness d is in the range of Δλ/Δd = 330-1200 nm/μm and 0.6-0.85 dB/nm, depending on sensor geometry and measurement method. This makes 1D PC with defect promising for the use as sensitive element in sensors of small movements.
{"title":"Датчик малых перемещений на основе одномерного фотонного кристалла с дефектом","authors":"Алексей Иванович Сидоров, М.В. Махаева","doi":"10.21883/os.2023.07.56133.4860-23","DOIUrl":"https://doi.org/10.21883/os.2023.07.56133.4860-23","url":null,"abstract":"The results of computer simulation of optical properties of one-dimensional (1D) photonic crystal (PC) with defect, based on the layers Si-SiO2 in near IR range are presented. The optical thicknesses of layers, which form PC, were λ/4, 3λ/4 and 10λ/4. Defect was formed by air gap in the middle of PC. The influence of defect thickness on spectral position of the transmission band of defect was studied. It was shown that the sensitivity on the defect thickness d is in the range of Δλ/Δd = 330-1200 nm/μm and 0.6-0.85 dB/nm, depending on sensor geometry and measurement method. This makes 1D PC with defect promising for the use as sensitive element in sensors of small movements.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73099987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.07.56135.4977-23
И.В. Маргарян, А.М. Митрошин, А. Ю. Дубовик, Е. В. Кунделев
The most important parameter determining the efficiency of carbon dots as light absorbers in photocatalytic systems is the strength of their binding to the catalyst. It is rather difficult to estimate the contribution of this parameter of carbon dots to the overall efficiency of the photocatalytic system, since the post-synthetic modification of the surface of carbon dots is accompanied by a significant change in their optical and structural properties. In this work, we performed post-synthetic modification of the surface of carbon dots based on citric acid by amination with ethylenediamine molecules by activating the carboxyl groups of carbon dots with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide molecules. The use of this amination approach made it possible to change the charge of carbon dots without changing their main optical and structural properties, which can be further used to assess the contribution of the strength of their binding with Dubois-type molecular catalysts to the overall efficiency of the photocatalytic system.
{"title":"Исследование оптических свойств аминированных углеродных точек на основе лимонной кислоты и этилендиамина","authors":"И.В. Маргарян, А.М. Митрошин, А. Ю. Дубовик, Е. В. Кунделев","doi":"10.21883/os.2023.07.56135.4977-23","DOIUrl":"https://doi.org/10.21883/os.2023.07.56135.4977-23","url":null,"abstract":"The most important parameter determining the efficiency of carbon dots as light absorbers in photocatalytic systems is the strength of their binding to the catalyst. It is rather difficult to estimate the contribution of this parameter of carbon dots to the overall efficiency of the photocatalytic system, since the post-synthetic modification of the surface of carbon dots is accompanied by a significant change in their optical and structural properties. In this work, we performed post-synthetic modification of the surface of carbon dots based on citric acid by amination with ethylenediamine molecules by activating the carboxyl groups of carbon dots with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide molecules. The use of this amination approach made it possible to change the charge of carbon dots without changing their main optical and structural properties, which can be further used to assess the contribution of the strength of their binding with Dubois-type molecular catalysts to the overall efficiency of the photocatalytic system.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73720002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.02.54994.5-23
И. Р. Хайрулин, Владимир Алексеевич Антонов, М. Ю. Емелин, М. М. Попова, Е.В. Грызлова, М.Ю. Рябикин
A multilevel model that makes it possible to describe multiphoton processes taking into account ionization in a multielectron atom irradiated by an intense laser field is proposed. Using the He atom as an example, it is shown that this model reproduces the main regularities of multiphoton ionization of an atom by an intense high-frequency laser field.
{"title":"Многоуровневая модель многофотонных процессов в атоме гелия в сильном лазерном поле: учет ионизации","authors":"И. Р. Хайрулин, Владимир Алексеевич Антонов, М. Ю. Емелин, М. М. Попова, Е.В. Грызлова, М.Ю. Рябикин","doi":"10.21883/os.2023.02.54994.5-23","DOIUrl":"https://doi.org/10.21883/os.2023.02.54994.5-23","url":null,"abstract":"A multilevel model that makes it possible to describe multiphoton processes taking into account ionization in a multielectron atom irradiated by an intense laser field is proposed. Using the He atom as an example, it is shown that this model reproduces the main regularities of multiphoton ionization of an atom by an intense high-frequency laser field.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84869643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.02.54997.4-23
Е.Н. Римская, Е. В. Кузьмин, П. А. Данилов, Г.Ю. Криулина, Д.А. Помазкин, С. И. Кудряшов
A study of three-dimensional photoluminescence of natural diamonds of two types, differing in morphology and absorption in the infrared range, was carried out. It is shown that, depending on the type and concentration of nitrogen defects in natural diamond, the position of the absorption band maximum can shift, which determines the pink or brown color of diamonds. The results of the study were carried out photoluminescence spectra at two pump wavelengths (488 and 532 nm), which make it possible to determine the optical centers that contribute to the color of diamonds. It is shown that complex nitrogen defects appear in natural colored diamonds as a result of plastic deformation, which determine the properties of the diamond.
{"title":"Трёхмерная микроспектроскопия оптических центров в цветных природных алмазах","authors":"Е.Н. Римская, Е. В. Кузьмин, П. А. Данилов, Г.Ю. Криулина, Д.А. Помазкин, С. И. Кудряшов","doi":"10.21883/os.2023.02.54997.4-23","DOIUrl":"https://doi.org/10.21883/os.2023.02.54997.4-23","url":null,"abstract":"A study of three-dimensional photoluminescence of natural diamonds of two types, differing in morphology and absorption in the infrared range, was carried out. It is shown that, depending on the type and concentration of nitrogen defects in natural diamond, the position of the absorption band maximum can shift, which determines the pink or brown color of diamonds. The results of the study were carried out photoluminescence spectra at two pump wavelengths (488 and 532 nm), which make it possible to determine the optical centers that contribute to the color of diamonds. It is shown that complex nitrogen defects appear in natural colored diamonds as a result of plastic deformation, which determine the properties of the diamond.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79421365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.02.54996.10-23
Андрей Валентинович Колчин, С.В. Заботнов, Д.В. Шулейко, П. И. Лазаренко, В.Б. Глухенькая, С. А. Козюхин, П. К. Кашкаров
Femtosecond laser irradiation of amorphous Ge2Sb2Te5 thin films initiates reversible phase transitions. The amorphization and crystallization of Ge2Sb2Te5 thin films were experimentally and theoretically confirmed. Electron and lattice temperatures kinetics during laser pulse duration were evaluated by two-temperature models calculations and experimental data. The dynamical changing of optical properties have been taking into account. Temperatures and cooling rates, which are necessary to initiate phase transitions by IR laser pulses with subpicosecond duration. The observed results open perspectives for improvement of Ge2Sb2Te5 nanophotonical devices.
{"title":"Кинетика обратимых фазовых переходов в тонких пленках Ge-=SUB=-2-=/SUB=-Sb-=SUB=-2-=/SUB=-Te-=SUB=-5-=/SUB=- при фемтосекундном лазерном облучении","authors":"Андрей Валентинович Колчин, С.В. Заботнов, Д.В. Шулейко, П. И. Лазаренко, В.Б. Глухенькая, С. А. Козюхин, П. К. Кашкаров","doi":"10.21883/os.2023.02.54996.10-23","DOIUrl":"https://doi.org/10.21883/os.2023.02.54996.10-23","url":null,"abstract":"Femtosecond laser irradiation of amorphous Ge2Sb2Te5 thin films initiates reversible phase transitions. The amorphization and crystallization of Ge2Sb2Te5 thin films were experimentally and theoretically confirmed. Electron and lattice temperatures kinetics during laser pulse duration were evaluated by two-temperature models calculations and experimental data. The dynamical changing of optical properties have been taking into account. Temperatures and cooling rates, which are necessary to initiate phase transitions by IR laser pulses with subpicosecond duration. The observed results open perspectives for improvement of Ge2Sb2Te5 nanophotonical devices.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80179383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.07.56136.4858-23
В.A. Ковтун-Кужель, А.Н. Понявина
Based on the interference approximation of the statistical theory of multiple wave scattering for planar systems characterized by two ordering scales, a model is proposed for calculating the coefficients of coherent transmission of Tcog, reflection Rcog and the angular distribution of the intensity of scattered radiation I(θ). The components of such systems are multimers, integral and angular characteristics, which can be calculated by the method of formalism of the volume integral equation. The radial distribution function of gm(r) multimers depends on their surface concentration ηm.. It was found that dense packing of multimers results in near-orderedness, which amplification electrodynamic coupling between the multimers and manifests itself in a nonmonotonic concentration dependence of the transmission coefficient.
{"title":"Взаимодействие электромагнитного излучения с двухмасштабными пространственно-упорядоченными ансамблями частиц цилиндрической формы","authors":"В.A. Ковтун-Кужель, А.Н. Понявина","doi":"10.21883/os.2023.07.56136.4858-23","DOIUrl":"https://doi.org/10.21883/os.2023.07.56136.4858-23","url":null,"abstract":"Based on the interference approximation of the statistical theory of multiple wave scattering for planar systems characterized by two ordering scales, a model is proposed for calculating the coefficients of coherent transmission of Tcog, reflection Rcog and the angular distribution of the intensity of scattered radiation I(θ). The components of such systems are multimers, integral and angular characteristics, which can be calculated by the method of formalism of the volume integral equation. The radial distribution function of gm(r) multimers depends on their surface concentration ηm.. It was found that dense packing of multimers results in near-orderedness, which amplification electrodynamic coupling between the multimers and manifests itself in a nonmonotonic concentration dependence of the transmission coefficient.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83130511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.05.55708.61-22
А.В. Астраханцева, А.А. Шавельев, С. В. Кузнецов, А. Г. Николаев, К. Н. Болдырев, Алексей Сергеевич Низамутдинов, Вадим Владимирович Семашко
The spectral and kinetic characteristics of Er3+ ions in heavily doped BaY1.8Lu0.2F8 mixed crystals have been studied. Absorption and luminescence spectra were recorded for BaY1.8Lu0.2F8 crystals with Er3+ ion concentrations of 20.0 and 30.0 at.%. The kinetic dependences of luminescence decay in the infrared range have also been studied. A model of the level populations of Er3+ ions is constructed on the basis of a three-level scheme for pumping the 4I11/2 state at a wavelength of 970 nm without taking into account up-conversion processes. The gain of BaY1.8Lu0.2F8 crystals with Er3+ ion concentrations of 20.0 and 30.0 at.% is estimated at different pump powers.
{"title":"Оптическая спектроскопия ионов Er-=SUP=-3+-=/SUP=- в кристаллах BaY-=SUB=-1,8-=/SUB=-Lu-=SUB=-0,2-=/SUB=-F-=SUB=-8-=/SUB=-","authors":"А.В. Астраханцева, А.А. Шавельев, С. В. Кузнецов, А. Г. Николаев, К. Н. Болдырев, Алексей Сергеевич Низамутдинов, Вадим Владимирович Семашко","doi":"10.21883/os.2023.05.55708.61-22","DOIUrl":"https://doi.org/10.21883/os.2023.05.55708.61-22","url":null,"abstract":"The spectral and kinetic characteristics of Er3+ ions in heavily doped BaY1.8Lu0.2F8 mixed crystals have been studied. Absorption and luminescence spectra were recorded for BaY1.8Lu0.2F8 crystals with Er3+ ion concentrations of 20.0 and 30.0 at.%. The kinetic dependences of luminescence decay in the infrared range have also been studied. A model of the level populations of Er3+ ions is constructed on the basis of a three-level scheme for pumping the 4I11/2 state at a wavelength of 970 nm without taking into account up-conversion processes. The gain of BaY1.8Lu0.2F8 crystals with Er3+ ion concentrations of 20.0 and 30.0 at.% is estimated at different pump powers.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89532221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/os.2023.04.55547.56-22
Н. М. Хайдуков, М. Н. Бреховских, Н. Ю. Кирикова, Вадим Анатольевич Кондратюк, В. Н. Махов
Single-phase ceramic samples of MgAl2O4, ZnAl2O4 and LiAl5O8 spinels containing manganese or chromium ions have been synthesized by a high-temperature solid-state reactions method. It has been shown that the luminescence properties of the synthesized phosphors, in particular, the appearance of intense red luminescence from Mn4+ ions, as well as the magnitude of inhomogeneous line broadening in the luminescence spectra of Mn4+ и Cr3+ ions depend on the degree of cation inversion, which provides the charge compensation for stabilizing Mn4+ ions in the octahedral sites of the spinel structures upon the substitution of Al3+ ions, simultaneously resulting in disordered spinel crystal structures.
{"title":"Люминесценция ионов марганца и хрома в соединениях со структурой шпинели","authors":"Н. М. Хайдуков, М. Н. Бреховских, Н. Ю. Кирикова, Вадим Анатольевич Кондратюк, В. Н. Махов","doi":"10.21883/os.2023.04.55547.56-22","DOIUrl":"https://doi.org/10.21883/os.2023.04.55547.56-22","url":null,"abstract":"Single-phase ceramic samples of MgAl2O4, ZnAl2O4 and LiAl5O8 spinels containing manganese or chromium ions have been synthesized by a high-temperature solid-state reactions method. It has been shown that the luminescence properties of the synthesized phosphors, in particular, the appearance of intense red luminescence from Mn4+ ions, as well as the magnitude of inhomogeneous line broadening in the luminescence spectra of Mn4+ и Cr3+ ions depend on the degree of cation inversion, which provides the charge compensation for stabilizing Mn4+ ions in the octahedral sites of the spinel structures upon the substitution of Al3+ ions, simultaneously resulting in disordered spinel crystal structures.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"2016 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86612927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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