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Oscillating Low Frequency Electro-Magnetic Fields action on eye retina restoration in Rattus Norvegicus was studied in the present work. A beneficial effect of 3-Dimention Oscillating Low Frequency Electro-Magnetic Field was found for the specific values of Electro-Magnetic Field parameters. We found that eye retina damaged by radiation of the fundamental frequency harmonic of a YAG laser has recovered earlier and rehabilitated to the original 3D-state in the presence of OLFEMF, with the parameters listed below in the text. The results obtained were explained by the action of oscillating sub-macro-motions in the cells upon the metabolic processes in these cells. [ABSTRACT FROM AUTHOR]

Polycarbonate (PC) and polymethyl methacrylate (PMMA) are the most widely used transparent matrices for the preparation of solid samples of optical limiting materials. It was observed that the polymer matrices (PC and PMMA) were damaged when exposed to laser radiation, and optical limiting effects emerged after laser damage. The damage thresholds and laser tolerance times of different commercial PCs and polymerized PMMA were systematically investigated through Z-scans. This study demonstrates that (1) the polymer matrix is not applicable for practical applications of optical limiters, and (2) the optical limiting performance of polymer matrix solid samples may be deviated. [ABSTRACT FROM AUTHOR]

The lifetime laser damage performance of a wide range of transparent conductive materials is assessed, including ultrathin metal films, doped metal oxides, doped compound semiconductors, and graphene whose carrier densities span five orders of magnitude from 1018 to 1023 cm−3. Lifetime laser damage thresholds are determined by exposing material surfaces to repeated nanosecond laser pulses at near IR wavelengths (1064 nm). Near threshold fluences, two distinct damage modes, i.e., bulk and discrete, emerge depending on carrier density. These bulk and discrete damage modes are attributed to free carrier‐induced bulk and localized, defect‐driven absorption processes, respectively. For polycrystalline films with free carrier densities greater than ≈1020 cm−3, laser damage thresholds are less than 5 J cm−2. In contrast, bulk absorption is not apparent at thresholds substantially higher than ≈10 J cm−2 in single‐crystal films with free carrier concentrations lower than ≈1019 cm−3. By increasing thickness, films with lower carrier densities can deliver relevant levels of sheet conductance (<200 Ω sq−1) while remaining transparent. These lifetime laser damage threshold measurements offer systematic criteria to select materials aimed at handling high optical powers in optoelectronics devices and emerging plasmonic and metamaterials for lasers. [ABSTRACT FROM AUTHOR]