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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">10.17586/22208054201785654660</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-705</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>Nonlinear optical and quantadimensional effects in monoselenide of gallium and indium</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Kyazimzade</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>Z. Khalilov str. 23, AZ1148, Baku</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Salmanov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="en"><p>Z. Khalilov str. 23, AZ1148, Baku</p></bio><email xlink:type="simple">vagif_salmanov@yahoo.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Huseynov</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>Z. Khalilov str. 23, AZ1148, Baku</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Mamedov</surname><given-names>R. M.</given-names></name></name-alternatives><bio xml:lang="en"><p>Z. Khalilov str. 23, AZ1148, Baku</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Salmanova</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>20 Azadliq ave., AZ1010, Baku</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Ahmedova</surname><given-names>F. Sh.</given-names></name></name-alternatives><bio xml:lang="en"><p>Z. Khalilov str. 23, AZ1148, Baku</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Baku State University</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>Azerbaijan State University of Oil and Industry</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>12</day><month>08</month><year>2025</year></pub-date><volume>8</volume><issue>5</issue><fpage>654</fpage><lpage>660</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kyazimzade A.G., Salmanov V.M., Huseynov A.G., Mamedov R.M., Salmanova A.A., Ahmedova F.S., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Kyazimzade A.G., Salmanov V.M., Huseynov A.G., Mamedov R.M., Salmanova A.A., Ahmedova F.S.</copyright-holder><copyright-holder xml:lang="en">Kyazimzade A.G., Salmanov V.M., Huseynov A.G., Mamedov R.M., Salmanova A.A., Ahmedova F.S.</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/705">https://nanojournal.ifmo.ru/jour/article/view/705</self-uri><abstract><p>Nonlinear light absorption and its time evolution at high optical excitation levels in GaSe and InSe layered crystals have been experimentally investigated. It is shown that the nonlinear absorption observed in InSe in the region of exciton resonance is due to the excitonexciton interaction. The effect of filling the zones detected in GaSe at high excitation intensities leads to a change in the absorption coefficient and the refractive index. For InSe nanoparticles obtained by the chemical deposition method, a quantadimensional effect was observed; the width of the forbidden band was dependent upon the dimensions of the nanoparticles.</p></abstract><kwd-group xml:lang="en"><kwd>nonlinear absorption</kwd><kwd>GaSe</kwd><kwd>InSe</kwd><kwd>bandfilling effect</kwd><kwd>nanoparticles</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Rogers F.J., Graboske H.C., Harwood D.J. Bound eigenstates of the static screenen coulomb potential. Phys. Rev. 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