Guided wave measurements for characterization of sol-gel layers

Piombini, Hervé; Dieudonné, Xavier; Wood, Thomas; Flory, F.

doi:10.1007/s10043-013-0073-7

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…The resulting nanocomposites demonstrate tunable elastic properties and a possible self-healing effect thanks to the incorporation of PDMS into the SiO2 network. To optimize these films, we have used various techniques to identify the optical characteristics [17][18][19][20], measure their stress level [21] and determine their elastic modulus [5][6]22]. In this paper, we used a homemade nano-indenter built from a microscope equipped with an x*y motorized stage.…”

Section: Introductionmentioning

confidence: 99%

Indentation hardness and scratch tests for thin layers manufactured by sol-gel process

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Indentation hardness and scratch tests for thin layers manufactured by sol-gel process

et al. 2021

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“…The development of the experimental ellipsometer took less than one year as we already had the experience and the right equipment [31,[43][44][45][46]. It was thus possible to design it to overcome some drawbacks.…”

Section: Methodsmentioning

confidence: 99%

Transparent Films Thickness Mapping Highlighting the Viscosity Effect of Elastic Layers Made by Sol–Gel Process with an In-House Ellipsometer

et al. 2023

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New optical coatings are currently developed to mitigate the shockwave generated by nanosecond lasers in high-power laser systems such as the MegaJoule laser (LMJ). These shockwaves seem responsible for the damage growth observed on optical components. A possible solution for shockwave mitigation is using ormosil (organically modified silicate) coatings made by the sol–gel method with thicknesses of a few microns. Unfortunately, the sol–gel solution exhibits a viscous behavior, and thus, the deposited layers are heterogeneous in thickness. An experimental ellipsometer has been designed to measure this heterogeneity and highlight the viscoelastic properties of the layers responsible for self-healing effects that were observed when these layers were scratched. This ellipsometer allows us to know the refractive index of the coating and therefore its density. Density and thickness are the two essential parameters for determining the speed of sound and the modulus of elasticity of the layer, which indicate the ability of the layer to attenuate more or less elastic waves or shock waves.

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