Luminescence in Ln2CaGe4O12 under infrared laser excitation

Зубков, В. Г.; Leonidov, Ivan I.; Tyutyunnik, A. P.; Tarakina, Nadezda V.; Сурат, Л. Л.; Perelyaeva, L. A.; Бакланова, И. В.; Koryakova, O. V.

doi:10.1016/j.jlumin.2009.03.037

Cited by 16 publications

(6 citation statements)

References 4 publications

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“…excited state absorption (ESA), energy transfer upconversion (ETU) and nonradiative multiphonon relaxation processes occurring in erbium and ytterbium ions are also illustrated. Besides the visible emission transitions, rather strong infrared emissions exist [16], that is also indicated. Numerical energy values are given based on diffuse reflection spectral data and NIR absorption spectra, measured for the Er 2 CaGe 4 O 12 and Yb 2 CaGe 4 O 12 samples ( Fig.…”

Section: Upconversion Luminescence Under 980 Nm Excitationmentioning

confidence: 65%

“…Intense fluorescence in Ln 2 CaGe 4 O 12 , Ln = Dy 3+ , Ho 3+ , Er 3+ and Tm 3+ , caused by f-f transitions in rare-earth ions has been found under a 976 nm laser excitation in the IR range [16]. The full profile structure refinement procedure reveals that erbium ions occupy both eight-and six-coordinated sites in Er x Y 2−x CaGe 4 O 12 , but mainly the 2b site with antiprismatic configuration and less the octahedral 4f site with an average ratio of 0.7/0.3.…”

Section: Introductionmentioning

confidence: 97%

“…Oxide matrices are still investigated widely in the field of optics, and luminescence properties in particular. Crystalline materials with cyclic anions [A 4 O 12 ], A = P [11,12], Si [13], V [14], Ge [15,16], in the structure are among them. Besides the problem of energy transfer Yb 3+ → Er 3+ (and/or Ho 3+ , Tm 3+ ) efficiency the other one lies in effective cooperative energy transfer in the nonresonant systems that may occur via phonon-assisted anti-Stokes sideband excitation [17].…”

Section: Introductionmentioning

confidence: 99%

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Upconversion luminescence in Er3+/Yb3+ codoped Y2CaGe4O12

Leonidov

Зубков

Tyutyunnik

et al. 2011

Journal of Alloys and Compounds

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Section: Upconversion Luminescence Under 980 Nm Excitationmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Upconversion luminescence in Er3+/Yb3+ codoped Y2CaGe4O12

Leonidov

Зубков

Tyutyunnik

et al. 2011

Journal of Alloys and Compounds

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“…Силикаты и германаты редкоземельных элементов (РЗЭ) представляют интерес в качестве эмиссион-ных сред видимого, ближнего и среднего ИК-диапа-зонов [1][2][3][4][5][6][7][8][9][10]. Особое место среди этих материалов занимают иттрийсодержащие силикаты кальция и строн-ция A 3 Y 2 (Si 3 O 9 ) 2 (A = Ca, Sr) [11][12][13][14][15][16][17].…”

Section: Introductionunclassified

Новый люминофор ИК-диапазона на основе германата Sr-=SUB=-3-=/SUB=-La-=SUB=-2-=/SUB=-(Ge-=SUB=-3-=/SUB=-O-=SUB=-9-=/SUB=-)-=SUB=-2-=/SUB=- : Nd-=SUP=-3+-=/SUP=-, Ho-=SUP=-3+-=/SUP=-

Мелкозерова¹,

Бакланова²,

Липина³

et al. 2018

Физика Твердого Тела

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Cyclogermanate Sr_3La_2(Ge_3O_9)_2, isostructural to silicate Sr_3Er_2(Si_3O_9)_2, activated by neodymium and holmium is obtained for the first time by the precursor method. Ion Nd^3+ in the structure of Sr_3La_2(Ge_3O_9)_2 is a sensitizer of the infrared luminescence of Ho^3+. Excitation by radiation with a wavelength of 808 nm leads to a series of emission lines in the luminescence spectra of Sr_3La_2- x Nd_ x (Ge_3O_9)_2 : Ho^3+ in the short-wave and middle-IR ranges (1.0–3.4 μm). The highest intensity of lines at 2.1 and 2.7 μm, associated with the ^5 I _7 → ^5 I _8 and ^5 I _6 → ^5 I _7 transitions in the Ho^3+ ion, is found for compositions containing traces of holmium. Based on the analysis of the concentration dependences of the luminescence intensity, an optimal composition of the phosphor is determined, which ensures the maximum efficiency of conversion of laser radiation energy. The data obtained are interpreted in the assumption of cross-relaxation energy transfer from Nd^3+ to Ho^3+.

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“…Германаты являются интенсивно исследуемым клас-сом неорганических соединений, используемых в каче-стве материалов в современной электронике, оптике, акустической электронике и лазерной физике [1][2][3][4][5][6][7][8][9]. Способность атомов германия соединяться между со-бой через атомы кислорода, образуя в зависимости от природы оксидов металлов и их соотношения с окси-дом германия анионы различного строения, приводит к появлению многообразных видов структур.…”

Section: Introductionunclassified

Термическое расширение и люминесцентные свойства триортогерманатов CaLa-=SUB=-2-x-=/SUB=-Eu-=SUB=-x-=/SUB=-Ge-=SUB=-3-=/SUB=-O-=SUB=-10-=/SUB=- (x=0.0-0.6)

Липина¹,

Сурат²,

Бакланова³

et al. 2018

Физика Твердого Тела

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Solid solutions CaLa_2- x Eu_ x Ge_3O_10 ( x = 0.0–0.6, Δ x = 0.1) have been synthesized for the first time. The compounds are isostructural to CaLa_2Ge_3O_10, they crystallize in the monoclinic system, space group P 2_1/ c , Z = 4. The low-temperature X-ray diffraction studies have revealed the strain anisotropy of germanate CaLa_2Ge_3O_10 crystal lattice in the temperature range 80–298 K, and the linear thermal expansion coefficients have been calculated. The optical properties of the activated phases have been studied, and the influence of the dopant concentration and the excitation wavelength on the luminescence characteristics of the synthesized compounds has been established.

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Luminescence in Ln2CaGe4O12 under infrared laser excitation

Cited by 16 publications

References 4 publications

Upconversion luminescence in Er3+/Yb3+ codoped Y2CaGe4O12

Upconversion luminescence in Er3+/Yb3+ codoped Y2CaGe4O12

Новый люминофор ИК-диапазона на основе германата Sr-=SUB=-3-=/SUB=-La-=SUB=-2-=/SUB=-(Ge-=SUB=-3-=/SUB=-O-=SUB=-9-=/SUB=-)-=SUB=-2-=/SUB=- : Nd-=SUP=-3+-=/SUP=-, Ho-=SUP=-3+-=/SUP=-

Термическое расширение и люминесцентные свойства триортогерманатов CaLa-=SUB=-2-x-=/SUB=-Eu-=SUB=-x-=/SUB=-Ge-=SUB=-3-=/SUB=-O-=SUB=-10-=/SUB=- (x=0.0-0.6)

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