Thermo-optical properties measurements in chalcogenide glasses using thermal relaxation and thermal lens methods

Lima, S.M.; Steimacher, A.; Medina, A. N.; Baesso, Mauro Luciano; Petrovich, M. N.; Rutt, H.N.; Hewak, Daniel W.

doi:10.1016/j.jnoncrysol.2004.08.134

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…Dual-beam TLS also differs in the direction of laser beam propagation through the sample. Three options are possible: (i) collinear (the beams are strictly co-axial) [ 31 , 38 ], (ii) the beams intersect in the sample at a small angle (usually 1.5°) [ 34 , 39 ], and (iii) the crossed-beams configuration (an angle of 90°) [ 15 , 40 ]. The latter case is relatively rarely used in thermophysical studies due to the difficulty of aligning the beams relative to each other and the small sample volume.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

2023

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Thermal-lens spectrometry is a sensitive technique for determination of physicochemical properties and thermophysical parameters of various materials including heterogeneous systems and nanoparticles. In this paper, we consider the issues of the correctness (trueness) of measurements of the characteristic time of the thermal-lens effect and, thus, of the thermal diffusivity determined by dual-beam mode-mismatching thermal lensing. As sources of systematic errors, major factors—radiation sources, sample-cell and detector parameters, and general measurement parameters—are considered using several configurations of the thermal-lens setups, and their contributions are quantified or estimated. Furthermore, with aqueous ferroin and Sudan I in ethanol as inert colorants, the effects of the intermolecular distance of the absorbing substance on the correctness of finding the thermophysical parameters are considered. The recommendations for checking the operation of the thermal-lens setup to ensure the maximum accuracy are given. The results obtained help reducing the impact of each investigated factor on the value of systematic error and correctly measure the thermophysical parameters using thermal-lens spectrometry.

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Section: Introductionmentioning

confidence: 99%

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

2023

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“…͑2͒, providing that the coefficient of thermal expansion ␣ is known from complementary measurements. We had recently measured the temperature coefficient of the optical path length change of the glasses analyzed in this study by the thermal lens ͑TL͒ method 26,27 ͓herein denoted as ͑ds / dT͒ TL ͔. A value of 4.6ϫ 10 −5 and 1.1ϫ 10 −5 K −1 as found at 632.8 nm for GLSO ͑Ref.…”

Section: Resultsmentioning

confidence: 92%

Temperature and wavelength dependence of the thermo-optical properties of tellurite and chalcogenide glasses

Silva

Sakai

Steimacher

et al. 2007

Journal of Applied Physics

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The refractive index and the temperature coefficient of the optical path length change of tellurite ͑80TeO 2 : 20Li 2 O͒ and chalcogenide glasses ͑72.5Ga 2 S 3 : 27.5La 2 O 3 ͒ were determined as a function of temperature ͑up to 150°C͒ and wavelength ͑in the range between 454 and 632.8 nm͒. The tellurite glass exhibits the usual refractive index dispersion in the wavelength range analyzed, while anomalous refractive index dispersion was observed for the chalcogenide glass between 454 and 530 nm. The dispersion parameters were determined by means of the single-effective oscillator model. In addition, a strong dependence of the temperature coefficient of the optical path length on the photon energy and temperature was found for the chalcogenide glass. The latter was correlated to the shift of the optical band gap ͑or electronic edge͒ with temperature, which was interpreted by the electron-phonon interaction model.

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“…These are typical values for this glass system [9]. The sample with thickness ~3.3 mm was polished on felt with diamond powders to optical quality.…”

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Observation of ⁴F_3/2→⁴I_15/2 radiative transition in Nd³⁺ ions in GaLaS glass using frequency‐resolved PL spectroscopy

Aoki

Koughia

Fujimoto

et al. 2009

Phys. Status Solidi (c)

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The photoluminescence (PL) emission band corresponding to 4F3/2→4I15/2 transition has been revealed using a double lock‐in technique and quadrature frequency resolved spectroscopy (QFRS) at room temperature in Nd3+ in a GaLaS glass. The band is centred around 1840 nm and has a lifetime ∼77 μs, which seems to be the same for all four radiative transitions 4F3/2→4IJ (J = 9/2, 11/2, 13/2 and 15/2). The branching ratios βJ of the four above transitions have been estimated from the PL data and agree well with the results of Judd‐Ofelt (JO) analysis. In addition to the 1840 nm band, we have observed another PL band appearing around 1580 nm and having a dominant lifetime ∼3.8 μs. This band may be identified with the radiative transition from the doublet (4F5/2, 2H9/2) to the 4I15/2 manifold. The short lifetime ∼3.8 μs may be caused by effective multiphonon relaxation from the doublet to the 4F3/2 manifold. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Thermo-optical properties measurements in chalcogenide glasses using thermal relaxation and thermal lens methods

Cited by 7 publications

References 18 publications

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

Temperature and wavelength dependence of the thermo-optical properties of tellurite and chalcogenide glasses

Observation of ⁴F_3/2→⁴I_15/2 radiative transition in Nd³⁺ ions in GaLaS glass using frequency‐resolved PL spectroscopy

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Thermo-optical properties measurements in chalcogenide glasses using thermal relaxation and thermal lens methods

Cited by 7 publications

References 18 publications

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

Temperature and wavelength dependence of the thermo-optical properties of tellurite and chalcogenide glasses

Observation of 4F3/2→4I15/2 radiative transition in Nd3+ ions in GaLaS glass using frequency‐resolved PL spectroscopy

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Observation of ⁴F_3/2→⁴I_15/2 radiative transition in Nd³⁺ ions in GaLaS glass using frequency‐resolved PL spectroscopy