alternativeАльтернативная энергетика и экология (ISJAEE)Alternative Energy and Ecology (ISJAEE)1608-8298Международный издательский дом научной периодики "Спейсalternative-31Research ArticleОПТИЧЕСКИЕ ЯВЛЕНИЯ И УСТРОЙСТВАOPTICAL PHENOMENA AND FACILITIESLiNbO3 КЛИНООБРАЗНАЯ TГц АНТЕННА, ЧАСТИЧНО ЗАПОЛНЯЮЩАЯ МЕТАЛЛИЧЕСКИЙ ВОЛНОВОДLiNbO3 TAPERED THz ANTENNA PARTIALLY FILLING THE METAL WAVEGUIDEНикогосянА. С.NikoghosyanA. S.

канд. физ.-мат. наук, доцент кафедры радиофизики СВЧ и телекоммуникаций

PhD, Associate Professor, Department of Microwave Radiophysics and Telecommunications

nika@ysu.amЕреванский Государственный университетАрменияYerevan State UniversityArmenia201507112015068791Copyright © Международный издательский дом научной периодики "Спейс, 20152015Международный издательский дом научной периодики "СпейсМеждународный издательский дом научной периодики "Спейсhttps://www.isjaee.com/jour/about/submissions#copyrightNoticehttps://www.isjaee.com/jour/article/view/31

В работе представлены результаты генерации широкополосного ТГц излучения в области 0,1-2 ТГц. Генерация ТГц излучения осуществлена в нелинейном кристалле LiNbO3 клинообразной формы благодаря нелинейному эффекту – оптическому выпрямлению фемтосекундных световых лазерных импульсов. Показано, что временные и частотные характеристики ТГц поля, излученного нелинейным клинообразным кристаллом, частично заполняющим металлический волновод, меняются,  если  кристалл  расположить  в  свободном  пространстве. В  спектре ТГц  импульса  интенсивные  спектральные линии наблюдались на частотах 279 ГГц и 1 ТГц.  

Results on generation of ultrabroadband terahertz (THz) radiation in band 0.1-2 THz via optical rectification of femtosecond laser pulses in nonlinear tapered crystal are presented. It is shown that placing the LiNbO3 crystal in the free space and in the hollow waveguide both the time and spectral features of the emitted THz field are changed. Several intense spectral regions (at 279 GHz and 1 ТHz) whose frequency depends on the LiNbO3 size are observed. Excitation of ТHz radiation in the tapered nonlinear crystal antenna, partially filling the metal waveguide with the help of an optical femtosecond laser pulse permits the resolution of problems connected with input/output coupling – mode matching and single mode propagation.

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The authors declare that there are no conflicts of interest present.