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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2025-16-1-58-66</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-90</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="en"><subject>CHEMISTRY AND MATERIALS SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И НАУКА О МАТЕРИАЛАХ</subject></subj-group></article-categories><title-group><article-title>Nanostructured transparent Fe2+-doped lithium aluminosilicate glass-ceramics with tunable optical properties: effect of heat-treatment regimes on near-infrared absorption</article-title><trans-title-group xml:lang="ru"><trans-title>Наноструктурированные прозрачные литиевоалюмосиликатные ситаллы, содержащие ионы Fe2+, с регулируемыми оптическими свойствами: влияние режимов термообработки на поглощение в ИК области спектра</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5587-4037</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Труханова</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Trukhanova</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kristina A. Trukhanova</p><p>15.2 Line 26th of Vasilyevsky Island, St. Petersburg, 199106</p></bio><email xlink:type="simple">kristina.truhanova@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1980-0561</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дымшиц</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Dymshits</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Olga S. Dymshits</p><p>26 Politekhnicheskaya, St. Petersburg, 194021</p><p>36 Babushkina, St. Petersburg, 192171</p></bio><email xlink:type="simple">vodym1959@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алексеева</surname><given-names>И. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Alekseeva</surname><given-names>I. P.</given-names></name></name-alternatives><bio xml:lang="en"><p>Irina P. Alekseeva</p><p>36 Babushkina, St. Petersburg, 192171</p></bio><email xlink:type="simple">vgolub19@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4243-1354</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Богданов</surname><given-names>К. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bogdanov</surname><given-names>K. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kirill V. Bogdanov</p><p>Kronverkskiy, 49, St. Petersburg, 197101</p></bio><email xlink:type="simple">kirw.bog@gmail.com</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Запалова</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zapalova</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Svetlana S. Zapalova</p><p>36 Babushkina, St. Petersburg, 192171</p></bio><email xlink:type="simple">zenii99@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Теневич</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Tenevich</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>Maksim I. Tenevich</p><p>26 Politekhnicheskaya, St. Petersburg, 194021</p></bio><email xlink:type="simple">mtenevich@gmail.com</email><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7015-1435</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бачина</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Bachina</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="en"><p>Anastasia K. Bachina</p><p>26 Politekhnicheskaya, St. Petersburg, 194021</p></bio><email xlink:type="simple">a.k.bachina@yandex.ru</email><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8450-4278</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Попков</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Popkov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>Vadim I. Popkov</p><p>26 Politekhnicheskaya, St. Petersburg, 194021</p></bio><email xlink:type="simple">vip-07@yandex.ru</email><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6681-6577</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жилин</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhilin</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Aleksandr A. Zhilin</p><p>3 Doroga na Metallostroi, pos. Metallostroi, St. Petersburg, 196641</p></bio><email xlink:type="simple">zhilin1311@yandex.ru</email><xref ref-type="aff" rid="aff-6"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Nordwestlab LLC</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>Ioffe Institute; Vavilov State Optical Institute</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-3"><institution>Vavilov State Optical Institute</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-4"><institution>ITMO University</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-5"><institution>Ioffe Institute</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-6"><institution>D. V. Efremov Institute of Electrophysical Apparatus</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>01</day><month>06</month><year>2025</year></pub-date><volume>16</volume><issue>1</issue><fpage>58</fpage><lpage>66</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Trukhanova K.A., Dymshits O.S., Alekseeva I.P., Bogdanov K.V., Zapalova S.S., Tenevich M.I., Bachina A.K., Popkov V.I., Zhilin A.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Труханова К.А., Дымшиц О.С., Алексеева И.П., Богданов К.В., Запалова С.С., Теневич М.И., Бачина А.К., Попков В.И., Жилин А.А.</copyright-holder><copyright-holder xml:lang="en">Trukhanova K.A., Dymshits O.S., Alekseeva I.P., Bogdanov K.V., Zapalova S.S., Tenevich M.I., Bachina A.K., Popkov V.I., Zhilin A.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://nanojournal.ifmo.ru/jour/article/view/90">https://nanojournal.ifmo.ru/jour/article/view/90</self-uri><abstract><p>This study explores optical tuning of nanostructured transparent lithium aluminosilicate glassceramics nucleated by titania and doped with Fe2+ ions. The glass was melted at 1620 C and heat-treated between 660 C and 800 C, yielding nanocrystals of -Al2O3 (2 – 23 nm) and  -quartz solid solutions (8 – 40 nm). Fe2+ ions in octahedral coordination in the initial glass are responsible for absorption in the 1000 – 1400 nm range. Tetrahedrally coordinated Fe2+ ions in -Al2O3 are responsible for absorption at 1550 – 2300 nm. Crystallization of  -quartz solid solutions leads to decreasing the -Al2O3 fraction and corresponding decrease of absorption at 1550 – 2300 nm. Differential scanning calorimetry, scanning electron microscopy, X-ray diffraction, Raman and optical spectroscopy reveal the relationship between heat-treatment regimes, crystalline phase development, and optical performance, highlighting the potential of Fe2+-doped LAS glass-ceramics for advanced photonic applications. The glass-ceramics exhibit customizable optical properties, promising for saturable absorbers in passive Q-switching lasers.</p></abstract><trans-abstract xml:lang="ru"><p>В работе исследована оптическая настройка наноструктурированных прозрачных литиевоалюмосиликатных ситаллов, содержащих диоксид титана в качестве нуклеатора кристаллизации и допированных ионами Fe²⁺. Стекло было сварено при температуре 1620 °C и термообработано в интервале температур 660 °C - 800 °C, в результате были выделены нанокристаллы γ-Al₂O₃ (2–23 нм) и твердых растворов β-кварца (8–40 нм). Ионы Fe²⁺ в октаэдрической координации в исходном стекле отвечают за поглощение в диапазоне 1000–1400 нм. Тетраэдрически координированные ионы Fe²⁺ в нанокристаллах γ-Al₂O₃ отвечают за поглощение в диапазоне 1550–2300 нм. Кристаллизация твердых растворов β-кварца приводит к уменьшению доли γ-Al₂O₃ и соответствующему уменьшению поглощения в области 1550–2300 нм. Дифференциальная сканирующая калориметрия, сканирующая электронная микроскопия, рентгеновская дифракция, спектроскопия комбинационного рассеяния света и оптическая спектроскопия выявляют взаимосвязь между режимами термообработки, развитием кристаллической фазы и оптическими характеристиками, подчеркивая потенциал ситаллов литиевоалюмосиликатной системы, легированных ионами Fe²⁺, для передовых фотонных приложений. Ситаллы демонстрирует настраиваемые оптические свойства, идеально подходящие для насыщающихся поглотителей лазеров с пассивной модуляцией добротности. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>Наноразмерные ситаллы</kwd><kwd>нанокристаллы y-Al2O3</kwd><kwd>нанокристаллы β-кварцевого твердого раствора</kwd><kwd>ионы Fe2+</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Nanophase glass-ceramics</kwd><kwd>-Al2O3 nanocrystals</kwd><kwd>nanocrystals of -quartz solid solution</kwd><kwd>Fe2+ ions</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was partly supported by the Russian Science Foundation (Grant 23-23-00446).</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">Method of Making Ceramics and Product Thereof. Method of Making Ceramics and Product Thereof: patent 2920971 U.S. Stookey, S.D. 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