Aerogel foil plasma: Forward scattering, back scattering, and transmission of laser radiation

Starodub, Alexander; Борисенко, Н. Г.; Fronya, A. A.; Merkuliev, Yu.A.; Осипов, М. В.; Puzyrev, V. N.; Sahakyan, A. T.; Vasin, B. L.; Yakushev, O. F.

doi:10.1017/s0263034610000315

Cited by 10 publications

(5 citation statements)

References 18 publications

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“…It is assumed that in the depth of porous substance a partially reflected and re-reflected laser light is, eventually, completely absorbed and the fraction of light being reflected in a near-surface layer and left leaving the target is considered to be negligible. This conclusion is based on the results available in the literature, which confirm an absorption efficiency for the foams close to 90% [15,28] and a very low transmission and reflection of laser light [28,34].…”

Section: The Foam Modelsupporting

confidence: 57%

Hydrodynamics and transport processes in porous materials under terawatt laser irradiation

et al. 2020

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Porous materials have many applications for laser-matter interaction experiments related to inertial confinement fusion. Obtaining new knowledge about the properties of the laser-produced plasma of porous media is a challenging task. In this work we review the development and the validation of the MULTI-FM code, by discussing the theoretical model on which the code is based, its implementation and the experiments on which the code has been tested. The experiments have been performed with the ABC laser located in the ENEA Research Center in Frascati. K: Simulation methods and programs; Plasma diagnostics -interferometry, spectroscopy and imaging; Plasma generation (laser-produced, RF, x ray-produced) 1Corresponding author.

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Section: The Foam Modelsupporting

confidence: 57%

Hydrodynamics and transport processes in porous materials under terawatt laser irradiation

et al. 2020

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“…Note: when the scattering is not uniform, even if S 1 << S a , the transmission cannot be ignored). [ 16 ] During calculation, we did not pay attention to visible light absorption as the percent of the absorbed light via silica aerogel is extremely low in the visible spectrum. The transmittance measurement result of the silica aerogels with different building block sizes is shown in Figure 2d.…”

Section: Resultsmentioning

confidence: 99%

Elaborate Size‐Tuning of Silica Aerogel Building Blocks Enables Laser‐Driven Lighting

Zhang

2021

Advanced Materials

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Silica aerogels with accurate building‐block control are realized by adjusting the surfactant concentration during the synthesis process. The resulting silica‐aerogel monolith with spherical building blocks of ≈24–40 nm, together with a deliberately created hole along the incident light direction, shows an incredibly promising application in monochromatic laser‐driven lighting. The resulting coefficient of illuminance variation is as low as 8.1%, significantly outperforming commercially available ground‐glass diffusers (139.0%) and polymer diffusers (249.1%); the speckle contrast is lower, as well as better, than that can be recognized by the human eye (4%), and the illuminance uniformity in the range of 0.770–0.862 is much better (higher) than that indoor workplace lighting required by the International Organization for Standardization. Lighting with any color in the visible spectrum, including white, can be obtained by using three primary color lasers (450, 532, and 638 nm) with different powers simultaneously as the light source. The resulting silica aerogel, which has excellent thermal stability, high laser‐damage threshold, outstanding mechanical performance, and superhydrophobicity, can be further applied to long‐distance and noncontact laser‐driven lighting in rain or underwater without any additional encapsulation components.

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“…Despite the low coherency, the multimode lasers have a number of advantages as compared with conventionally used high-coherent lasers: simple optical scheme, high output power, the absence of spatial filters and vacuum channels, etc. Currently the facility 'Kanal-2' is used to study the interactions of fundamental radiation with different solid-state and microstructured targets [10,11], and experiments of lasermatter interaction at the frequency of the second harmonic are planned. Therefore, it is of great importance to study the SHG of the low-coherent multimode radiation in a nonlinear crystal.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical conversion of Nd:glass laser multimode radiation into the second harmonic in KDP crystal

Dmitriev

Осипов

Puzyrev

et al. 2012

J. Phys. B: At. Mol. Opt. Phys.

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The second-harmonic generation (SHG) of Nd:glass multimode laser radiation in a 3 cm long KDP crystal has been studied both experimentally and theoretically for type I doubling at power densities of up to 2.5 GW cm −2 , radiation divergence of 0.5-3.5 mrad and between 100-1000 transverse modes. The theoretical calculations of SHG were performed in the fixed-field approximation, fixed-intensity approximation and in the nonlinear regime. The maximum experimental conversion efficiency of 52% was obtained for the case of partially polarized radiation with divergence of 0.5 mrad and 100 transverse modes.

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Aerogel foil plasma: Forward scattering, back scattering, and transmission of laser radiation

Cited by 10 publications

References 18 publications

Hydrodynamics and transport processes in porous materials under terawatt laser irradiation

Hydrodynamics and transport processes in porous materials under terawatt laser irradiation

Elaborate Size‐Tuning of Silica Aerogel Building Blocks Enables Laser‐Driven Lighting

Nonlinear optical conversion of Nd:glass laser multimode radiation into the second harmonic in KDP crystal

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