Nonlinear optical features on Yb3+/Tm3+ codoped PbO-GeO2 glasses with Si nanoparticles

Fuks-Janczarek, I.; Miedzinski, R.; Kassab, L.R.P.; Alves, F.M.b

doi:10.1016/j.materresbull.2016.01.032

Cited by 17 publications

(2 citation statements)

References 35 publications

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“…In a previous report [25] we showed that PbOGeO 2 glasses with Si nanoparticles could be successfully used to build optical limiting devices at 532(nm). However the influence of temperature on Z-scan experiments was not studied in that investigation as it is done in the present paper.…”

Section: Thermal Effects During the Z-scan Experimentsmentioning

confidence: 98%

Heat Transfer in Z-scan Experiments

Miedzinski,

Fuks-Janczarek,

Kassab

2023

Preprint

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In this study, we present the results of theoretical calculations related to heat transfer in materials subjected to laser radiation, with a focus on Z-scan experiments. Utilising a computational approach, we employ explicit difference methods to model the temperature distribution in three-dimensional hexahedral samples of varying sizes, including [4x4x2]mm, [5x5x2]mm, and [6x6x2]mm. The simulations incorporate the effects of three distinct types of pulse lasers, each with duration of 10 (ns), 100 (ps), and 100 (fs). Laser parameters are tailored such that they yield a peak on-axis irradiance of 5 (GW/cm2). The temperature distribution within the samples, denoted as T(x, y, z, t), is calculated using our novel laser heat source model, specifically designed for the simulated problem. This research is facilitated by our computational program, Z-lambda, which enables the simulation of thermal processes not only during but also after Z-scan experiments. The computed results reveal that analysing thermal aspects in Z-scan experiments necessitates considering factors such as laser pulse duration, sample geometry, laser repetition time, sample heating, and the experimental environment. Our findings provide valuable insights into the intricacies of heat transfer during and after Z-scan experiments, shedding light on the interplay between laser parameters, sample properties, and thermal responses. This work enhances our understanding of thermal processes in the context of laser-induced heating, offering significant implications for the design and interpretation of Z-scan experiments.

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Section: Thermal Effects During the Z-scan Experimentsmentioning

confidence: 98%

Heat Transfer in Z-scan Experiments

Miedzinski,

Fuks-Janczarek,

Kassab

2023

Preprint

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“…Our group has carried out broadband ultrafast nonlinear optical studies of zero-dimensional Cs 4 PbBr 6 perovskite films 34 and CsPbBr 3 NCs, 35 unveiling their photonic responses in the NLO domain. If we talk about rare-earth-doped materials, 36 they show good NLO activities. However, no reports are found on the NLO properties of lanthanide-doped halide perovskites.…”

Section: Introductionmentioning

confidence: 99%

Tunable near-infrared emission and three-photon absorption in lanthanide-doped double perovskite nanocrystals

Lavadiya

Nayak

et al. 2023

Nanoscale

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Heat transfer in Z-scan experiments

Miedzinski,

Fuks-Janczarek,

Kassab

2024

Appl. Phys. B

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In this study, we present the results of theoretical calculations concerning heat exchange in materials subjected to laser irradiation, with particular emphasis on Z-scan experiments. Using explicit difference methods, we model the temperature distribution in three-dimensional samples of various sizes, such as [4 $$\times$$ × 4 $$\times$$ × 2] mm, [5 $$\times$$ × 5 $$\times$$ × 2] mm, and [6 $$\times$$ × 6 $$\times$$ × 2] mm. The simulations encompass two different types of pulsed lasers with durations of 10 (ns) and 100 (ps), adjusting laser parameters to achieve a peak irradiance intensity of 5 GW/cm$${^2}$$ 2 . The temperature distribution in samples, denoted as T(x, y, z, t), is computed using a novel laser heat source model specifically designed for this problem. The computational program Z-lambda enables not only the simulation of thermal processes during the Z-scan experiment but also post-experiment analysis. The development of this software was one of the main objectives of this study. The results indicate that the thermal analysis of Z-scan experiments requires consideration of factors such as laser pulse duration, laser repetition time, sample geometry, and heat exchange between the studied material and the surroundings. Especially in the Z-scan technique, controlling thermal parameters before the experiment is crucial for obtaining precise and reproducible results. It is noteworthy that sample heating during the experiment can significantly influence charge carrier density, subsequently affecting the parameters of nonlinear optics (NLO). Tools like the Z-lambda program allow for the optimization of laser parameters, minimizing sample heating, and reducing the thermal impact on NLO parameters.

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Nonlinear optical features on Yb3+/Tm3+ codoped PbO-GeO2 glasses with Si nanoparticles

Cited by 17 publications

References 35 publications

Heat Transfer in Z-scan Experiments

Heat Transfer in Z-scan Experiments

Tunable near-infrared emission and three-photon absorption in lanthanide-doped double perovskite nanocrystals

Heat transfer in Z-scan experiments

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