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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">alternative</journal-id><journal-title-group><journal-title xml:lang="ru">Альтернативная энергетика и экология (ISJAEE)</journal-title><trans-title-group xml:lang="en"><trans-title>Alternative Energy and Ecology (ISJAEE)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1608-8298</issn><publisher><publisher-name>Международный издательский дом научной периодики "Спейс</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">alternative-395</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>ОПТИЧЕСКИЕ ЯВЛЕНИЯ И УСТРОЙСТВА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>OPTICAL PHENOMENA AND FACILITIES</subject></subj-group></article-categories><title-group><article-title>LiNbO3 КЛИНООБРАЗНАЯ ТГц АНТЕННА</article-title><trans-title-group xml:lang="en"><trans-title>LiNbO3 WEDGE THz ANTENNA</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>Никогосян</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikoghosyan</surname><given-names>A. S.</given-names></name></name-alternatives><email xlink:type="simple">nika@ysu.am</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ереванский Государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Yerevan State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>23</day><month>06</month><year>2016</year></pub-date><issue>2</issue><fpage>138</fpage><lpage>141</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Международный издательский дом научной периодики "Спейс, 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Международный издательский дом научной периодики "Спейс</copyright-holder><copyright-holder xml:lang="en">Международный издательский дом научной периодики "Спейс</copyright-holder><license xlink:href="https://www.isjaee.com/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.isjaee.com/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.isjaee.com/jour/article/view/395">https://www.isjaee.com/jour/article/view/395</self-uri><abstract><p>Представлены результаты генерации ультракоротких электрических импульсов с широкополосным спектром в интервале частот от 0.1 до 1.5 ТГц посредством оптического выпрямления фемтосекундных лазерных импульсов в нелинейном клинообразном кристалле. Для численного моделирования и симуляции распространения ТГц волны в клинообразной TiNbO3 антенне применен метод конечных элементов. Полученные данные использованы для анализа экспериментальных результатов. Исследовано влияние формы кристалла на распространение ТГц излучения в кристалле ' и вне его в ближне-полевой зоне.</p></abstract><trans-abstract xml:lang="en"><p>The articles present results of the generation of THz pulse in 0.1-1.5 THz band via optical rectification of femtosecond laser pulses in a wedge nonlinear crystal. The fmite-element method was employed to model and simulate the THz wave propagation in a TiNbO3 wedge antenna in order to analyze experimental results and to visualize how the form of the crystal influences the THz radiation both inside and outside the crystal in the near-field zone.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>оптическое выпрямление</kwd><kwd>фемтосекундный лазер</kwd><kwd>терагерцовое излучение</kwd><kwd>ТГц LiNbO3 клинообразная антенна</kwd><kwd>метод конечных элементов</kwd><kwd>оptical rectification</kwd><kwd>femtosecond laser</kwd><kwd>terahertz radiation</kwd><kwd>THz LiNbO3 wedge antenna</kwd><kwd>finite-element method</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">Zoughi R. Microwave nondestructive testing: Theories and applications // Proc. IEEE International Advances in Nondestructive Testing (IANDT). New York: Gordon and Breach, 1990. 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