Spectroscopic, optical, and thermomechanical properties of neodymium- and chromium-doped gadolinium scandium gallium garnet

Krupke, William F.; Shinn, Michelle D.; Marion, John E.; Caird, J. A.; Stokowski, S. E.

doi:10.1364/josab.3.000102

Cited by 362 publications

(118 citation statements)

References 38 publications

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“…In Samples B and C, the experimentally deduced A r almost agrees with the theoretically estimated values [34,35] which was obtained by using the Judd-Ofelt parameters Ω t (t = 2, 4, 6) in (Er x ,Sc 1−x ) 2 O 3 transparent ceramics with x = 0.003 [36]. On the other hand, a larger A r was observed in Sample A, and it suggests the increase in the effective transition dipole moment.…”

Section: Time-resolved Photoluminescence Measurementssupporting

confidence: 78%

Investigation of Population Dynamics in 1.54-μm Telecom Transitions of Epitaxial (ErxSc1-x)2O3 Thin Layers for Coherent Population Manipulation: Weak Excitation Regime

et al. 2018

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Abstract:We have investigated the energy transfers in the 1.54-µm region of (Er,Sc) 2 O 3 epitaxial thin films grown on Si(111). The interplay of the energy transfers between Er ions in the different and the same symmetry sites makes the dynamics complicated. To suppress the energy transfer upconversion, low power and resonant excitation of the third crystal-field level ( 4 I 13/2 : Y 3 ) of the Er 3+ site with C 3i symmetry was employed. The time-resolved photoluminescence measurements of the Y 1 -Z 1 transition indicate the existence of two decay components having fast (10-100 µs) and slow (0.1-1 ms) relaxation times in the range of 4-60 K. The model calculation including the inter-site energy transfers, the temperature-sensitive and -insensitive non-radiative relaxations fits the experimental results well. Moreover, the long averaged inter-Er 3+ distance obtained by decreasing Er concentration was found to reduce two kinds of non-radiative relaxation rates and the energy transfer rates between Er ions very effectively.

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Section: Time-resolved Photoluminescence Measurementssupporting

confidence: 78%

Investigation of Population Dynamics in 1.54-μm Telecom Transitions of Epitaxial (ErxSc1-x)2O3 Thin Layers for Coherent Population Manipulation: Weak Excitation Regime

et al. 2018

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“…The thermal diffusivity at 1000 °C in (a) and (b) is extrapolated from our data by using the model of Roufosse and Klemens (1974). Kanamori et al (1968), Hor69: Horai and Simmons (1969), Sla71: Slack and Oliver (1971), Zha84: Zharikov et al (1984, Kru86: Krupke et al (1986), Cha96: Chai et al (1996, Pad97: Padture andKlemens (1997), Osa97, Osa04: Osako andEiji (1997); Osako et al (2004), Pat01: Patel et al (2001), Kuw04: Kuwano et al (2004), Mar05: Marquardt et al (2005), Hof06: Hofmeister (2006, Sat06: Sato and Taira (2006). a,b,c,d values are reported in terms of thermal conductivity and were converted to thermal diffusivity using eq.…”

Section: Discussionmentioning

confidence: 99%

“…D. L. Anderson, 1989). Beside its relevance in geosciences, an improved understanding of heat transport properties in insulators is important for issues in material sciences, such as solid state laser design (Krupke et al, 1986), thermal barrier coatings (Padture & Klemens, 1997), or electronic packaging (Weidenfeller et al, 2004). Most natural silicate garnets can be assigned to the ternary solid solution series pyralspite (pyrope-almandinespessartine) and ugrandite (uvarovite-grossular-andradite).…”

Section: Introductionmentioning

confidence: 99%

Thermal diffusivity of natural and synthetic garnet solid solution series

2008

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Knowledge of heat transport properties as a function of mineral-and rock-composition and temperature is of major relevance to understand and model heat transfer in the Earth's interior. A systematic study on 13 natural and 4 synthetic garnets was carried out in an attempt to obtain a better systematic understanding of the processes that affect the heat transport in minerals, especially the effect of chemical substitution in solid solution series. It is found that substitution significantly lowers the thermal diffusivity from end-member values for both synthetic and natural garnets with a minimum of thermal diffusivity at an intermediate composition. The thermal diffusivity as a function of the degree of substitution can be described by the approach of Padture and Klemens (1997). With increasing temperature the thermal diffusivity decreases due to phononphonon-scattering effects. A quantitative analysis of the high-temperature behaviour was carried out by using the model of Roufosse and Klemens (1974), which takes a lower limit of thermal diffusivity at elevated temperatures into account. The model allows for an extrapolation of the deduced room temperature thermal diffusivities to higher temperatures. Furthermore, the model was modified to determine the high temperature limit of the thermal diffusivity for all investigated natural garnets D min to be 0.64±0.03 mm 2 /s.

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“…Deux types de méthodes peuvent être utilisées pour déterminer une section efficace d'émission stimulée : 1) Les méthodes spectroscopiques de McCumber, dite aussi de « réciprocité » RM [48,1,58], et de Fuchtbauer-Ladenburg (FL) [28,52] qui reposent néanmoins sur une parfaite connaissance de la structure énergétique de l'ion émetteur et des mesures de spectres d'absorption et d'émission, respectivement.…”

Section: Mesure De Section Efficace D'émission Stimuléeunclassified

Cristaux laser à ions de terres rares

Moncorgé

2003

Élaboration Et Caractérisation Des Cristaux Massifs Et en Couches Minces Pour l'Optique

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Spectroscopic, optical, and thermomechanical properties of neodymium- and chromium-doped gadolinium scandium gallium garnet

Cited by 362 publications

References 38 publications

Investigation of Population Dynamics in 1.54-μm Telecom Transitions of Epitaxial (ErxSc1-x)2O3 Thin Layers for Coherent Population Manipulation: Weak Excitation Regime

Investigation of Population Dynamics in 1.54-μm Telecom Transitions of Epitaxial (ErxSc1-x)2O3 Thin Layers for Coherent Population Manipulation: Weak Excitation Regime

Thermal diffusivity of natural and synthetic garnet solid solution series

Cristaux laser à ions de terres rares

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