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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-608</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>Статьи</subject></subj-group></article-categories><title-group><article-title>ОПТИЧЕСКОЕ ПОГЛОЩЕНИЕ КОМПОЗИТА НА ОСНОВЕ ДВУХСЛОЙНЫХ МЕТАЛЛ-ДИЭЛЕКТРИЧЕСКИХ СФЕРИЧЕСКИХ НАНОЧАСТИЦ</article-title><trans-title-group xml:lang="en"><trans-title>OPTICAL ABSORPTION OF A COMPOSITE BASED ON BILAYER METAL-DIELECTRIC SPHERICAL NANOPARTICLES</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>Коротун</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Korotun</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>69063, Запорожье</p></bio><bio xml:lang="en"><p>69063, Zaporizhzhia</p></bio><email xlink:type="simple">andko@zntu.edu.ua</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>Коваль</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Koval’</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>69063, Запорожье</p></bio><bio xml:lang="en"><p>69063, Zaporizhzhia</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>Титов</surname><given-names>И. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Titov</surname><given-names>I. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>69002, Запорожье</p></bio><bio xml:lang="en"><p>69002, Zaporizhzhia</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный университет “Запорожская политехника”</institution></aff><aff xml:lang="en"><institution>National University “Zaporizhzhia Politechnic”</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>UAD Systems</institution></aff><aff xml:lang="en"><institution>UAD Systems</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>07</day><month>05</month><year>2020</year></pub-date><volume>87</volume><issue>2</issue><fpage>224</fpage><lpage>232</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Коротун А.В., Коваль А.А., Титов И.Н., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Коротун А.В., Коваль А.А., Титов И.Н.</copyright-holder><copyright-holder xml:lang="en">Korotun A.V., Koval’ A.A., Titov I.N.</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/608">https://zhps.ejournal.by/jour/article/view/608</self-uri><abstract><p>В классическом приближении исследованы оптические свойства наночастиц типа ядро—металлическая оболочка и композитов на их основе. Рассчитаны частотные зависимости действительной и мнимой частей диэлектрической проницаемости двухслойных частиц, а также коэффициента поглощения композита на их основе. Установлено существование мелкомасштабных осцилляций действительной и мнимой частей диэлектрической проницаемости и коэффициента поглощения в низкочастотной области спектра. Проанализировано поведение диэлектрической проницаемости двухслойных наночастиц для предельных случаев тонкой и толстой оболочек. Рассмотрено влияние эффективной длины свободного пробега электронов на оптические характеристики двухслойных наночастиц. Продемонстрировано наличие двух максимумов коэффициента поглощения композита, обусловленных гибридизацией полярных мод.</p></abstract><trans-abstract xml:lang="en"><p>We investigated the optical properties of nanoparticles of the core-metal shell type and the composites based on them in the classical approximation. The frequency dependences of the real and imaginary parts of the dielectric permeability of bilayer particles, as well as the absorption coefficient of the composites based on them, are calculated. We established the existence of small-scale oscillations of the real and imaginary parts of the dielectric permeability and absorption coefficient in the low-frequency region of the spectrum. The behavior of the dielectric function of bilayer nanoparticles for the limiting cases of thin and thick shells is analyzed. The influence of the effective mean free path of electrons on the optical characteristics of bilayer nanoparticles is considered. The presence of two maxima of the absorption coefficient of the composite due to the hybridization of polar modes is demonstrated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нанооболочка</kwd><kwd>композит</kwd><kwd>диэлектрическая проницаемость</kwd><kwd>частотная зависимость</kwd><kwd>поглощение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nanoshell</kwd><kwd>composite</kwd><kwd>dielectric function</kwd><kwd>frequency dependence</kwd><kwd>absorption</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">B. N. Khlebtsov, N. G. Khlebtsov. J. Quant. Spectrosc. RA, 107 (2007) 306—314</mixed-citation><mixed-citation xml:lang="en">B. N. Khlebtsov, N. G. Khlebtsov. J. Quant. Spectrosc. RA, 107 (2007) 306—314</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">K. Tanabe. J. Phys. 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