Kinetics of reversible phase transitions in Ge2Sb2Te5 thin films at femtosecond laser irradiation

Авторы: Kolchin A.V., Zabotnov S.V., Shuleiko D.V., Lazarenko P.I., Glukhenkaya V.B., Kozyukhin S.A., Kashkarov P.K.
Журнал: Optics and Spectroscopy (English translation of Optika i Spektroskopiya)
Том: 131
Номер: 2
Год издания: 2023
Издательство: Optical Society of America
Местоположение издательства: United States
Первая страница: 137
Последняя страница: 144
Аннотация: Femtosecond laser irradiation of amorphous Ge2Sb2Te5 thin films initiates reversible phase transitions. The amorphization and crystallization of Ge2Sb2Te5 thin films were experimentally and theoretically confirmed. Electron and lattice temperatures kinetics during laser pulse duration were evaluated by two-temperature models calculations and experimental data. The dynamical changing of optical properties have been taking into account. Temperatures and cooling rates, which are necessary to initiate phase transitions by IR laser pulses with subpicosecond duration, were found. The observed results open perspectives for improvement of Ge2Sb2Te5 nanophotonics devices.
Добавил в систему: Заботнов Станислав Васильевич

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