24.03.2021

Wirtualne seminarium: Ultrafast nonthermal all-optical switching of magnetization


Akademickie Centrum Materiałów i Nanotechnologii AGH zaprasza na wirtualne seminarium z cyklu „Krakow Condensed Matter Seminar”, które odbędzie się 24 marca 2021 r. o godz. 9.00.

Referat pt. Ultrafast nonthermal all-optical switching of magnetization wygłosi dr hab. Andrzej Stupakiewicz , prof. UwB (Wydział Fizyki Uniwersytetu w Białymstoku).

Link dla uczestników

Streszczenie

All-optical control of spins with ultrashort laser pulses is an intriguing and rapidly growing fundamental research area as well as an increasingly important issue in modern data storage technology. We demonstrate ultrafast and nonthermal photo-magnetic switching in ferrimagnetic dielectric iron garnet films using time-resolved magneto-optical imaging. The single linearly polarized 50 fs laser pulse promote switching of the magnetization at roomtemperature without external magnetic field. Changing the linear polarization of this laser pulse we deterministically steer the net magnetization, write ”0” and “1” magnetic bits at will. A novel mechanism of this switching allows ever fastest write-readmagnetic recording accompanied by record low dissipation. We anticipate that the low-dissipative magnetization switching open up a plethora of opportunities for a novel design of cold photo-magnetic recording.