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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of Experimental and Theoretical Physics</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Experimental and Theoretical Physics</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал экспериментальной и теоретической физики</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-4510</issn><issn publication-format="electronic">3034-641X</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">653516</article-id><article-id pub-id-type="doi">10.31857/S0044451023050061</article-id><article-id pub-id-type="edn">BDSFKN</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Terahertz Time-Domain Spectroscopy (THz-TDS) of LED Heterostructures with Three and Five InxGa1 – xN/GaN Quantum Wells</article-title><trans-title-group xml:lang="ru"><trans-title>Терагерцевая спектроскопия с временным разрешением (THZ–TDS) светодиодных гетероструктур с тремя и пятью квантовымиямами InxGa1−xN/GaN</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Burmistrov</surname><given-names>E. R</given-names></name><name xml:lang="ru"><surname>Бурмистров</surname><given-names>Е. Р</given-names></name></name-alternatives><email>eugeni.conovaloff@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Avakyants</surname><given-names>L. P</given-names></name><name xml:lang="ru"><surname>Авакянц</surname><given-names>Л. П</given-names></name></name-alternatives><email>avakyants@physics.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М. В. Ломоносова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-05-15" publication-format="electronic"><day>15</day><month>05</month><year>2023</year></pub-date><volume>163</volume><issue>5</issue><issue-title xml:lang="en">NO5 (2023)</issue-title><issue-title xml:lang="ru">№5 (2023)</issue-title><fpage>669</fpage><lpage>681</lpage><history><date date-type="received" iso-8601-date="2025-02-05"><day>05</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Российская академия наук</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0044-4510/article/view/653516">https://transsyst.ru/0044-4510/article/view/653516</self-uri><abstract xml:lang="en"><p>Using terahertz time-domain spectroscopy (THz-TDS), we have detected resonance frequencies of plasmon oscillations excited in heterostructures with multiple InxGa1 – xN/GaN quantum wells by laser pulses with a duration of 130 fs in the temperature range from 90 to 170 K. The fast Fourier transform of temporal forms of terahertz pulses has made it possible to obtain frequency spectra of the power and of the phase shift of terahertz radiation, the interpretation of which has allowed us to estimate the quasi-momentum relaxation time (τ = 10–12 s), mobility (μ = 4 × 103 cm2/(V s)), and effective mass (m* = 0.45m) of majority charge carriers in these heterostructures. Based on the frequency spectra of power and phase shift of terahertz radiation, we have obtained the temperature dependences of the effective mass and relaxation time of the quasi-momentum of a 2D electron gas (2DEG). The 2DEG mobility value obtained by the THz-TDS method is in good agreement with the Hall measurement data.</p></abstract><trans-abstract xml:lang="ru"><p>Методом терагерцевой спектроскопии с временным разрешением (THz-TDs) зарегистрированы резонансные частоты плазмонных осцилляций, возбуждаемые в гетероструктурах со множественными квантовыми ямами InxGa1-x N/GaN лазерными импульсами длительностью 130 фс в диапазоне температур от 90 до 170 К. Быстрое преобразование Фурье временных форм терагерцевых импульсов позволило получить частотные спектры мощности и фазового сдвига терагерцевого излучения, интерпретация которых дала12 3 2-возможность оценить время релаксации квазиимпульса (τ = 10 с), подвижность (µ = 4 · 10 см /В · с)∗и эффективную массу (m = 0.45m) основных носителей заряда в исследованных гетероструктурах. На основании частотных спектров мощности и фазового сдвига терагерцевого излучения были получены температурные зависимости эффективной массы и времени релаксации квазиимпульса двумерного электронного газа (2DEG). Значение подвижности 2DEG, полученное методом THz-TDs, хорошо согласуюется с данными холловских измерений.</p></trans-abstract><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>B. Richard and M. Schasfoort, Handbook of Surface Plasmon Resonance, (2017).</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>A. Ando, T. Kurose, V. Reymond, K. Kitano, H. Kitahara, K. Takano, M. Tani, M. Hangyo, and S. Hamaguchi, J. Appl. Phys. 110, 7 (2011).</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>S. P. Jamison, D. R. Jones, R. C. Issac, B. Ersfeld, D. Clark, and D. A. Jaroszynski, J. Appl. Phys. 93, 7 (2003).</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>C. 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