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Optically pumped Floquet states of magnetization in ferromagnetsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 7 марта 2019 г.
- Авторы: Savochkin I.V., Zvezdin A.K., Belotelov V.I.
- Журнал: Optics Letters
- Том: 44
- Номер: 2
- Год издания: 2019
- Издательство: Optical Society of America
- Местоположение издательства: United States
- Первая страница: 331
- Последняя страница: 334
- DOI: 10.1364/ol.44.000331
- Аннотация: Floquet states have been subject of great research interest since Zel’dovich’s pioneering work on the quasienergy of a quantum system influenced by a temporally periodic action. Nowadays periodic modulation of the system Hamiltonian is mostly achieved by microwaves leading to novel exciting phenomena in condensed matter physics. On the other hand, nonthermal optical control of magnetization at picosecond time scales is currently a highly appealing research topic for potential applications in magnetic data storage. Here we combine these two concepts to theoretically investigate Floquet states in the system of exchange-coupled spins in a ferromagnet. Periodic perturbation of the magnetization of an iron-garnet film by circularly-polarized femtosecond laser pulses is shown to establish the magnetization dynamics behaving like Floquet states. An external magnetic field allows tuning of the Floquet states leading to a pronounced increase of the precession amplitude by one order of magnitude at the center of the Brillouin zone, i.e. when the precession frequency is a multiple of the laser pulse repetition rate. Floquet states might potentially allow for parametric generation of magnetic oscillations. The observed phenomena expand the capabilities of coherent ultrafast optical control of magnetization and pave a way for their application in quantum computation or data processing.
- Добавил в систему: Савочкин Игорь Владимирович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Savochkin_Zvezdin_et_al_2019_-_Optically_pumped_Floquet_sta… | 1,4 МБ | 3 марта 2019 [SavochkinIV] |