<article 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" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of Experimental and Theoretical Physics</journal-id><journal-title-group><journal-title>Journal of Experimental and Theoretical Physics</journal-title></journal-title-group><issn publication-format="print">0044-4510</issn><issn publication-format="electronic">3034-641X</issn><publisher><publisher-name>Russian Academy of Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31857/S0044451023040053</article-id><title-group><article-title>High Optical Harmonics Generation on Solid Surfaces Irradiated by Mid-IR Femtosecond Laser Pulses</article-title><trans-title-group xml:lang="ru"><trans-title>Генерация высоких оптических гармоник при взаимодействии фемтосекундных лазерных импульсов среднего ИК-диапазона с поверхностью твердотельных мишеней</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Mitrofanov</surname><given-names>A. V</given-names></name><name xml:lang="ru"><surname>Митрофанов</surname><given-names>А. В </given-names></name></name-alternatives><email>mitrofanov_a_v_noemail@ras.ru</email><xref ref-type="aff" rid="aff-1"></xref><xref ref-type="aff" rid="aff-2"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Rozhko</surname><given-names>M. V</given-names></name><name xml:lang="ru"><surname>Рожко</surname><given-names>М. В </given-names></name></name-alternatives><email>rozhko_m_v_noemail@ras.ru</email><xref ref-type="aff" rid="aff-3"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Nazarov</surname><given-names>M. M</given-names></name><name xml:lang="ru"><surname>Назаров</surname><given-names>М. М </given-names></name></name-alternatives><email>nazarov_m_m_noemail@ras.ru</email><xref ref-type="aff" rid="aff-5"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Serebryannikov</surname><given-names>E. E</given-names></name><name xml:lang="ru"><surname>Серебрянников</surname><given-names>Е. Е </given-names></name></name-alternatives><email>serebryannikov_e_e_noemail@ras.ru</email><xref ref-type="aff" rid="aff-7"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Fedotov</surname><given-names>A. B</given-names></name><name xml:lang="ru"><surname>Федотов</surname><given-names>А. Б </given-names></name></name-alternatives><email>fedotov_a_b_noemail@ras.ru</email><xref ref-type="aff" rid="aff-9"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Sidorov-biryukov</surname><given-names>D. A</given-names></name><name xml:lang="ru"><surname>Сидоров-бирюков</surname><given-names>Д. А </given-names></name></name-alternatives><email>sidorov-biryukov_d_a_noemail@ras.ru</email><xref ref-type="aff" rid="aff-11"></xref></contrib></contrib-group><aff-alternatives id="aff-1"><aff><institution xml:lang="ru">Российский квантовый центр; Московский государственный университет им. М.В. Ломоносова; Федеральное государственное учреждение «Федеральный научно-исследовательский центр «Кристаллография и фотоника» Российской академии наук»</institution><institution xml:lang="en">Russian Quantum Center; Faculty of Physics, M.V. Lomonosov Moscow State University; ILIT RAS – Branch of FSRC “Crystallography and Photonics” RAS</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff><institution xml:lang="ru"></institution><institution xml:lang="en"></institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff><institution xml:lang="ru">Российский квантовый центр; Московский государственный университет им. М.В. Ломоносова</institution><institution xml:lang="en">Russian Quantum Center; Faculty of Physics, M.V. Lomonosov Moscow State University;</institution></aff></aff-alternatives><aff-alternatives id="aff-5"><aff><institution xml:lang="ru">Национальный исследовательский центр «Курчатовский институт»</institution><institution xml:lang="en">National Research Center “Kurchatov Institute”</institution></aff></aff-alternatives><aff-alternatives id="aff-7"><aff><institution xml:lang="ru">Российский квантовый центр; Московский государственный университет им. М.В. Ломоносова</institution><institution xml:lang="en">Russian Quantum Center; Faculty of Physics, M.V. Lomonosov Moscow State University;</institution></aff></aff-alternatives><aff-alternatives id="aff-9"><aff><institution xml:lang="ru">Российский квантовый центр; Московский государственный университет им. М.В. Ломоносова</institution><institution xml:lang="en">Russian Quantum Center; Faculty of Physics, M.V. Lomonosov Moscow State University;</institution></aff></aff-alternatives><aff-alternatives id="aff-11"><aff><institution xml:lang="ru">Российский квантовый центр; Московский государственный университет им. М.В. Ломоносова; Национальный исследовательский центр «Курчатовский институт»</institution><institution xml:lang="en">Russian Quantum Center; Faculty of Physics, M.V. Lomonosov Moscow State University; National Research Center “Kurchatov Institute”</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-04-01" publication-format="electronic"><day>01</day><month>04</month><year>2023</year></pub-date><volume>163</volume><issue>4</issue><fpage>488</fpage><lpage>495</lpage><abstract xml:lang="en"><p>We obtained the spectra of high optical harmonics produced by subrelativistic femtosecond pulses on the surface of polystyrene, CaF2, BK7, and Al solid targets. High harmonics of up to the 51st order of radiation with central 3.85 µm wavelength were observed. The highest order harmonics were generated from the polystyrene target surface. The harmonics energy versus their numbers is shown to fit well a decaying power law with the exponent ranging from 4 to 8/3.</p></abstract><trans-abstract xml:lang="ru"><p>Экспериментально исследованы спектры высоких оптических гармоник при воздействии фемтосекундных импульсов субрелятивисткой интенсивности на поверхность твердотельных мишеней из полистирола, CaF2, BK7 и Al. Зарегистрированы гармоники до 51 порядка от излучения с центральной длиной волны 3.85 мкм. Показано, что наиболее высокие порядки гармоник наблюдаются при взаимодействии лазерного излучения с поверхностью мишеней из полистирола. Экспериментально зарегистрировано, что зависимость энергии гармоник от их номера может быть аппроксимирована убывающей степенной функцией с показателем от 4 до 8/3.</p></trans-abstract></article-meta></front><body></body><back><ref-list><ref id="B1"><label>B1</label><citation-alternatives><mixed-citation xml:lang="ru">N. Blombergen and Y. R. Shen, Phys. 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