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Obtaining a porous surface on germanium by exposure to infrared nanosecond laser pulses
Russian version
. Rogalin V. E.1, . Zheleznov V. Yu/1, Malinsky T. V.1, Mikolutsky S. I.1, Filin S. A.1, Khomich Yu. V.1, Sergeev A. A.2, Ivakin S. V.2, Kaplunov I. A. 3, Ivanova A. I.3, Andreeva M.S.4
1Institute for Electrophysics and Electric Power, Russian Academy of Sciences, St. Petersburg, Russia
2Baltic State Technical University "VOENMEKH" named after Marshal D. F. Ustinov, St. Petersburg, Russia
3Tver State University, Tver, Russia
4Lomonosov Moscow State University, Moscow, Russia
Email: v-rogalin@mail.ru
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The creation of porous structures on the surface of monocrystalline germanium is considered in order to change the values of reflection coefficients, reflection indicators, and surface preparation for diffusion welding. For this purpose, exposure to powerful pulses of a nanosecond IR laser in an aqueous medium was used. It is shown that in this way it is possible to create separate sections with a porous structure with a pore size from fractions to 10 microns on the surface of monocrystalline germanium. The optimal pulse energy density is of the order of 30 J/cm2. Keywords: germanium (Ge), nanosecond laser, aqueous medium, porous surface, diffusion welding.
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