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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1840</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>ОПТИЧЕСКИЕ МАТЕРИАЛЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>OPTICAL MATERIALS</subject></subj-group></article-categories><title-group><article-title>Тонкопленочное покрытие с пониженным коэффициентом оптического отражения на основе слоя нанопористого германия</article-title><trans-title-group xml:lang="en"><trans-title>Thin-Film Coating with Reduced Optical Reflection Coefficient Based on Germanium Nanoporous Layer</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5101-1808</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Степанов</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Stepanov</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><email xlink:type="simple">aanstep@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рогов</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Rogov</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сотникова</surname><given-names>В. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Sotnikova</surname><given-names>V. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Валеев</surname><given-names>В. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Valeev</surname><given-names>V. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нуждин</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Nuzhdin</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коновалов</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Konovalov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский физико-технический институт им. Е. К. Завойского ФИЦ “Казанский научный  центр РАН”</institution></aff><aff xml:lang="en"><institution>Zavoisky Physical-Technical Institute, FRC “Kazan Scientific Center of RAS”</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>26</day><month>09</month><year>2025</year></pub-date><volume>92</volume><issue>5</issue><fpage>674</fpage><lpage>678</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Степанов А.Л., Рогов А.М., Сотникова В.Ф., Валеев В.Ф., Нуждин В.И., Коновалов Д.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Степанов А.Л., Рогов А.М., Сотникова В.Ф., Валеев В.Ф., Нуждин В.И., Коновалов Д.А.</copyright-holder><copyright-holder xml:lang="en">Stepanov A.L., Rogov A.M., Sotnikova V.F., Valeev V.F., Nuzhdin V.I., Konovalov D.A.</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://zhps.ejournal.by/jour/article/view/1840">https://zhps.ejournal.by/jour/article/view/1840</self-uri><abstract><p>Предложен метод получения покрытия с пониженным коэффициентом оптического отражения на основе нанопористых слоев германия (Ge), основанный на имплантации ионами 209Bi++ монокристаллического c-Ge при энергии E = 72 кэВ, плотности тока в ионном пучке J = 5 мкA/см2 и интервале доз D = 1.3 ꞏ 1015—2.5 &gt;ꞏ 1016 ион/см2. Установлено, что, начиная с D = 6.2 · 1015 ион/см2, формируется вспученный губчатый слой Bi:PGe толщиной порядка 100 нм, состоящий из тонких переплетающихся нанонитей Ge, который не меняет свои морфологические особенности с ростом D. Данный слой характеризуется низким коэффициентом оптического отражения (&lt; 3 %) в видимом диапазоне спектра.</p></abstract><trans-abstract xml:lang="en"><p>A method for producing a coating with a reduced optical reflectivity coefficient based on nanoporous Ge layers by implantation of monocrystalline c-Ge with 209Bi++ ions at an energy of E = 72 keV, a current density of J = 5 μA/cm2 and a dose interval of D = 1.3 ꞏ 1015—2.5 ꞏ 1016 ion/cm2 is proposed. It is found that starting from D = 6.2 ꞏ 1015 ion/cm2, an swelling spongy Bi:PGe layer with a thickness of about 100 nm is formed. This layer consists of thin intertwined Ge nanowires, which does not change morphological features with the increasing of values D. The layer is characterized by a low optical reflectivity coefficient (&lt; 3%) in the visible spectral range.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нанопористый германий</kwd><kwd>имплантация ионами висмута</kwd><kwd>антиотражающее оптическое покрытие</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nanoporous germanium</kwd><kwd>bismuth ion implantation</kwd><kwd>antireflection optical coating</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках проекта РНФ № 25-29-00022.</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">Z. Zhou, W. Liu, Y. Guo, H. Huang, X. Ding. Coatings, 12 (2022) 1653(1—13), doi: 10.3390/coatings12111653</mixed-citation><mixed-citation xml:lang="en">Z. Zhou, W. Liu, Y. Guo, H. Huang, X. Ding. 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