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Considered is the two-dimensional (2-D) source-free problem of the H-polarized electromagnetic field in the presence of a silver circular nanotube coated with a concentric layer of active material and with a core of similar active material. We assume that the natural-mode frequency is real-valued and look for it together with the threshold value of material gain in the active regions. As a method,...
Lasers can be useful not only in the obvious "hardware" application for the generated "soup" composition controlling by different methods of laser spectroscopy, but also in the generation of perspective hypotheses
Measured luminescence spectra of inert gases and their binary mixtures at heavy ion beam excitation from DC-60 accelerator. Spectra measured in the range of 300–975 nm; the gas spectra is dominated by lines of p-s and d-p atomic transitions, N2, N2+ bands, in neon also line of oxygen atom, in krypton the band of KrO excimer molecule were also observed. Conclusions have been made on level population...
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