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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nguphys</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский физический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>SIBERIAN JOURNAL OF PHYSICS</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2541-9447</issn><publisher><publisher-name>Новосибирский государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25205/2541-9447-2022-17-4-5-17</article-id><article-id custom-type="elpub" pub-id-type="custom">nguphys-223</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КВАНТОВАЯ ОПТИКА, КВАНТОВАЯ ЭЛЕКТРОНИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>QUANTUM OPTICS, QUANTUM ELECTRONICS</subject></subj-group></article-categories><title-group><article-title>О возможном механизме усиления поглощения мощного лазерного излучения в металле</article-title><trans-title-group xml:lang="en"><trans-title>On Possible Mechanism of Enhancement of Absorption of Powerful Laser Radiation by Metals</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жуков</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhukov</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жуков Владимир Петрович, доктор физико-математических наук</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Vladimir P. Zhukov, Doctor of Sciences (Physics and Mathematics)</p><p>Novosibirsk</p></bio><email xlink:type="simple">zukov@ict.nsc.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральный исследовательский центр информационных и вычислительных технологий; Новосибирский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Research Center for Information and Computational Technologies; Novosibirsk State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>10</day><month>05</month><year>2023</year></pub-date><volume>17</volume><issue>4</issue><fpage>5</fpage><lpage>17</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Жуков В.П., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Жуков В.П.</copyright-holder><copyright-holder xml:lang="en">Zhukov V.P.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://nguphys.elpub.ru/jour/article/view/223">https://nguphys.elpub.ru/jour/article/view/223</self-uri><abstract><p>В работе показано, что зависимость массы электронов проводимости металла от их энергии может служить причиной увеличения поглощения лазерного излучения большой мощности, падающего на этот металл. Для этого решена задача об отклике (токе) электрона, находящегося в одномерном периодическом потенциале (решетке) на периодическое во времени электрическое поле (электромагнитную волну). Показано, что при достаточно большой амплитуде поля зависимость тока от неё становится нелинейной. Причем в определенном диапазоне параметров эта зависимость может быть описана простой формулой, которая соответствует зависимости массы электрона от его энергии. Формула использована для решения задачи о проникновении электромагнитной волны в металл в рамках модифицированной соответствующим образом модели Друде. Показано, что нелинейная зависимость тока от амплитуды поля приводит к увеличению поглощения волны и образованию шлейфа волн с околоплазменными частотами, проникающих в глубь металла. Обсуждаемые эффекты проявляются при напряженностях электрического поля порядка 1 В/Ангстрем. Полученные результаты могут быть использованы при интерпретации экспериментальных данных и создании математических моделей взаимодействия мощного лазерного излучения с металлом.</p></abstract><trans-abstract xml:lang="en"><p>In this work, it is shown that the dependence of the mass of conductive band electrons in a metal on their energy can be a reason of enhancement of the absorption of powerful laser radiation by the metal. To do this, a problem of response (current) of the electron placed in one-dimension periodic potential (lattice) to an electric field periodic in time (electromagnetic wave) is solved. The solution shows that for sufficiently large amplitude of the wave the dependence of the electron current on the wave amplitude becomes non-linear. Within a certain rangе of parameters, this dependence can be described by a simple formula that corresponds to the dependence of the electron mass on its energy. The formula was used for solving the problem of penetration of electromagnetic wave into a metal with the approach of modified Drude model. The non-linearity results in the enhancement of the wave absorption and generation of wave with frequencies close to those of plasma penetrating deep into the metal. The discussed effects manifest themselves in electric fields about. 1 V/Angstrom. The obtained results can be used in the interpretation of experiments data and in the creation of mathematical modeling of the interaction of powerful laser radiation with metal.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>взаимодействие лазерного излучения с металлами</kwd><kwd>мощный лазерный импульс</kwd><kwd>нелинейные оптические эффекты</kwd><kwd>модель Друде</kwd></kwd-group><kwd-group xml:lang="en"><kwd>laser-metal interaction</kwd><kwd>high-power laser pulse</kwd><kwd>nonlinear optic effects</kwd><kwd>Drude model</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Автор выражает благодарность Н.М. Булгаковой, Т. Дирену (T. J.Y. Derrien), С.А. Лизунову за полезные обсуждения.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bauerle D. W. Laser Processing and Chemistry. 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