Polarized Infrared Reflectivity Spectra of SrLaAlO4 and SrLaGaO4 Single Crystals

Kamba, S.; Buixaderas, E.; Pajączkowska, A.

doi:10.1002/(sici)1521-396x(199807)168:1<317::aid-pssa317>3.0.co;2-p

Cited by 11 publications

(12 citation statements)

References 15 publications

(19 reference statements)

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“…The results of the TO phonon frequencies of SLAO in our measurements are in good agreement with those observed by other groups. 14,15 The phonon vibration properties of SLAO are similar to those of La 2 NiO 4 18,19 and La 2 CuO 4 , 18,20 which have a tetragonal structure similar to that of SLAO single crystal. According to the results of lattice dynamics calculations, 16,19,20 it was considered that the observed phonon modes correspond to the following vibration modes: The lowest mode E u (1) is probably the vibrating motion of Sr/La ions against the AlO 6 octahedra.…”

Section: Shown Inmentioning

confidence: 66%

“…The fifth mode ͑at Ϸ712 cm Ϫ1 ͒ in the reflectivity spectra of SLAO crystal has probably its origin in two-phonon absorption because of its low intensity. 15 From the satisfactory fit of experimental reflectivity spectra with the oscillator model, the dielectric functions ⑀͑͒ of the in-plane component of SLAO crystal can be obtained. Shown in Figs.…”

Section: Shown Inmentioning

confidence: 99%

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Far-infrared optical properties of SrLaAlO4 single crystal

Chen

et al. 2004

Journal of Applied Physics

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Near-normal incidence infrared reflectivity spectra of ͑001͒ strontium lanthanum aluminate (SrLaAlO 4 ) single crystal have been measured under different temperatures in the frequency region between 100 and 6500 cm Ϫ1 . Five phonon modes are distinguished at low frequency while no spectral features were observed above 1000 cm Ϫ1 . All the reflectivity spectra are fitted with the factorized form of the dielectric function. The dielectric properties of the SrLaAlO 4 crystal in far-infrared region are presented and analyzed.

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Section: Shown Inmentioning

confidence: 66%

Section: Shown Inmentioning

confidence: 99%

Far-infrared optical properties of SrLaAlO4 single crystal

Chen

et al. 2004

Journal of Applied Physics

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“…As can be observed from Figure 6 the nonradiative decay rates in SLO are about one order of magnitude higher than in ZBLAN. The difference in results from higher in the case of SLO of the the phonon frequency distribution function, which is approximately hω max = 707 cm −1 [32], than in ZBLAN matrix, which is 580 cm −1 [3].…”

Section: I7mentioning

confidence: 99%

Optical Transitions and Excited State Absorption Cross Sections of SrLaGaO4 Doped with Ho3+ Ions

Kaczkan

Malinowski

2021

Materials

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The spectroscopic properties of SrLaGaO4 (SLO) crystal doped with Ho3+ ions were studied in this work. Absorption, emission spectra and decay dynamics of excited states have been measured and discussed using the Judd–Ofelt model. Photoluminescence emissions were attributed to transitions from the excited 3D3, 5S2, 5F5, 5I6 and 5I7 multiplet manifolds. The experimental lifetimes for five excited states have been compared to the theoretical values, calculated using Judd–Ofelt theory, allowing for the determination of the multiphonon relaxation rates (WnR) of the respective states. The experimental data were approximately on a line expressed by WnR = W0 exp(−αΔE) with W0 = 0.5 × 107 s−1 and α = 2.6 × 10−3 cm. To discuss the excited state absorption (ESA) pathways, that originated from several excited levels, we used the Judd–Ofelt formalism allowing determination of the integrated cross section for ESA transitions.

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“…SrLaAlO 4 crystals do not generally develop twins nor form intermediate phases at high temperature and possess low dielectric constant and low dielectric losses . Several authors have investigated thermal, crystallization, and optical properties of SrLaAlO 4 single crystal . Single crystal SrLaAlO 4 exhibits uniaxial anisotropic optical and thermal properties .…”

Section: Introductionmentioning

confidence: 99%

“…Several authors have investigated thermal, crystallization, and optical properties of SrLaAlO 4 single crystal . Single crystal SrLaAlO 4 exhibits uniaxial anisotropic optical and thermal properties . The infrared optical properties have been investigated by Humlíček et al .…”

Section: Introductionmentioning

confidence: 99%

Near infrared to ultraviolet anisotropic optical properties of single crystal SrLaAlO₄ from spectroscopic ellipsometry

Adhikari

Uprety

Ghimire

et al. 2016

Physica Status Solidi (b)

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The anisotropic optical properties of single crystal SrLaAlO 4 are investigated using spectroscopic ellipsometry over the range from 0.74 to 5.90 eV. Divided spectral range analysis of ellipsometric and Mueller matrix spectra are used to obtain the sample structural parameters (surface roughness thickness and void fraction). The ordinary and extra-ordinary optical properties in the form of complex dielectric function, e ¼ e 1 þ ie 2 (or complex index of refraction, N ¼ n þ ik), spectra are extracted from the same analysis. The observed birefringence is $ 0.025 in the transparent range. An upper limit for the indirect gap at 3.01 AE 0.01 eV and a critical point at 5.54 AE 0.01 eV are identified within the measured spectral range.

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Polarized Infrared Reflectivity Spectra of SrLaAlO4 and SrLaGaO4 Single Crystals

Cited by 11 publications

References 15 publications

Far-infrared optical properties of SrLaAlO4 single crystal

Far-infrared optical properties of SrLaAlO4 single crystal

Optical Transitions and Excited State Absorption Cross Sections of SrLaGaO4 Doped with Ho3+ Ions

Near infrared to ultraviolet anisotropic optical properties of single crystal SrLaAlO₄ from spectroscopic ellipsometry

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Polarized Infrared Reflectivity Spectra of SrLaAlO4 and SrLaGaO4 Single Crystals

Cited by 11 publications

References 15 publications

Far-infrared optical properties of SrLaAlO4 single crystal

Far-infrared optical properties of SrLaAlO4 single crystal

Optical Transitions and Excited State Absorption Cross Sections of SrLaGaO4 Doped with Ho3+ Ions

Near infrared to ultraviolet anisotropic optical properties of single crystal SrLaAlO4 from spectroscopic ellipsometry

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Near infrared to ultraviolet anisotropic optical properties of single crystal SrLaAlO₄ from spectroscopic ellipsometry