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Please use this identifier to cite or link to this item: https://elib.bsu.by/handle/123456789/203758
Title: Распространение солитона в полупроводниковой сверхрешетке, облучаемой нелинейной электромагнитной волной
Other Titles: The propagation of а soliton in a semiconducting superlattice exposed to radiation of a nonlinear electromagnetic wave / S. V. Kryuchkov, E. G. Fyodorov
Authors: Крючков, С. В.
Федоров, Э. Г.
Keywords: ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика
Issue Date: 2001
Publisher: Минск : БГУ
Citation: Взаимодействие излучений с твердым телом: материалы IV Междунар. науч. конф., 3-5 окт. 2001 г., Минск. — Мн.: БГУ, 2001. — С. 34-36.
Abstract: Предложен метод стабилизации процесса распространения электромагнитного (ЭМ) солитона в квантовой полупроводниковой сверхрешетке (CP). Показано, что возможно усиление импульса в CP, облучаемой высокочастотной нелинейной ЭМ волной, распространяющейся вдоль слоев СР. Отмечено, что под действием межминизонных электронных переходов усиление импульса может смениться стационарным режимом, отвечающим диссипативному солитону. Найдено условие существенного возрастания характерного времени пробега солитона под действием поля нелинейной волны при учете столкновений электронов с нерегулярностями кристаллической структуры СР.
Abstract (in another language): The main difficulty in the experimental investigation of electromagnetic solitons is their intensive damping in solids, and particularly in quantum semiconducting superlattices (SL). In this connection an effective method for stabilization of the form of a soliton is developed. It can be realized when the SL is exposed to radiation of a nonlinear electromagnetic wave with electric pump field directed along the SL axis (perpendicularly to the SL layers). An equation describing the propagation of an electromagnetic pulse in the SL under the influence of the pump field is derived. It Is shown that an electromagnetic pulse can be amplified if the pump field meets certain conditions. As the pulse propagates, its frequency is blue-shifted in the spectrum while the number of photons in the pulse remains unchanged when It is amplified. An increase of the frequency of the pulse can lead to the effective admixture of neighboring minlbands in which absorbtlon should prevent amplification of the pulse. When the frequency of the pulse becomes equal to the frequency of the Inter miniband transitions of electrons the pulse transforms into the dissipatlve soliton. Its velocity, amplitude and width depend on medium properties only. The influence of infrequent collisions of electrons with irregularities of the lattice on the soliton dynamics is estimated. The condition under which the transit time of a soliton essentially increases is derived taking into account the influence of the pump field and collisions.
URI: http://elib.bsu.by/handle/123456789/203758
ISBN: 985-445-236-0
Appears in Collections:2001. Взаимодействие излучений с твердым телом

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