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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">nguphys</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский физический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>SIBERIAN JOURNAL OF PHYSICS</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2541-9447</issn><publisher><publisher-name>Новосибирский государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25205/2541-9447-2022-17-4-87-94</article-id><article-id custom-type="elpub" pub-id-type="custom">nguphys-229</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>ФИЗИКА ТВЕРДОГО ТЕЛА, ПОЛУПРОВОДНИКОВ, НАНОСТРУКТУР</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SOLID-STATE AND SEMICONDUCTOR PHYSICS, PHYSICS OF NANOSTRUCTURES</subject></subj-group></article-categories><title-group><article-title>Особенности определения оптических параметров (n и κ) полупроводниковой гетероструктуры из спектров пропускания и отражения</article-title><trans-title-group xml:lang="en"><trans-title>Peculiarities of Determination of the Optical Parameters (n and κ) of a Semiconductor Heterostructure from Transmission and Reflection Spectra</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>Ковалёв</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalyov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ковалёв Александр Анатольевич, кандидат физико-математических наук, старший научный сотрудник</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Alexander A. Kovalyov, Dr. of Phys.Math. Sc.</p><p>Novosibirsk</p></bio><email xlink:type="simple">kovalev@isp.nsc.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики полупроводников им. А. В. Ржанова СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Semiconductor Physics Mechanics SB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>10</day><month>05</month><year>2023</year></pub-date><volume>17</volume><issue>4</issue><fpage>87</fpage><lpage>94</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ковалёв А.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Ковалёв А.А.</copyright-holder><copyright-holder xml:lang="en">Kovalyov 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://nguphys.elpub.ru/jour/article/view/229">https://nguphys.elpub.ru/jour/article/view/229</self-uri><abstract><p>Спектры показателя преломления n и коэффициента экстинкции κ тонкой пленки, образуемой гетероструктурой в виде сверхрешетки In0,2Ga0,8As/GaAs, определяются из сравнения измеренных коэффициентов отражения и пропускания образца, выращенного на подложке GaAs, с соответствующими характеристиками, рассчитанными матричным методом. Значения n и κ сверхрешетки находятся из процедуры минимизации по параметрам n и κ целевой функции F(n, κ), образованной суммой модулей разностей измеренных и рассчитанных коэффициентов отражения и пропускания.</p></abstract><trans-abstract xml:lang="en"><p>In the wavelength range λ = 900–1200 nm, the spectral dependences of the refractive index n and extinction coefficient κ of a thin film, which is the heterostructure based on In0.2Ga0.8As/GaAs quantum wells, are found. The values of n and κ found at each point of the spectrum provide the minimum of the objective function, which is the sum of the module of the differences between the calculated reflection and transmission coefficients and the measured reflection and transmission coefficients of the sample grown on the GaAs substrate.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>оптика тонких пленок</kwd><kwd>преломление</kwd><kwd>экстинкция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>thin film optics</kwd><kwd>refraction</kwd><kwd>extinction</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Автор признателен сотрудникам ИФП СО РАН канд. физ.-мат. наук Б. Р. Семягину за выращивание образца полупроводниковой сверхрешетки и д-ру физ.-мат. наук Н. Н. Рубцовой за полезные обсуждения.</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">Swanepoel R. 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