Interplay of heating and helicity in all-optical magnetization switching

Autor:	Daniel Steil, Martin Aeschlimann, Sabine Alebrand, Mirko Cinchetti, Alexander Hassdenteufel
Rok vydání:	2012
Předmět:	Materials science Photon Physics::Optics Condensed Matter Physics Laser Helicity Electronic Optical and Magnetic Materials law.invention Magnetization All optical law Picosecond Magnet Atomic physics Excitation
Zdroj:	Physical Review B. 85
ISSN:	1550-235X 1098-0121
DOI:	10.1103/physrevb.85.092401
Popis:	Contrasting hypotheses have been made about the role played by laser heating and photon helicity in all-optical switching. Here we present an experiment that distinguishes between heating- and helicity-driven effects. We show that even though a minimum amount of circularity is needed to switch, heating contributes to the process. Moreover, we show that the helicity information carried by the exciting laser pulses is more easily transferred into the magnetic material at lower temperatures and that it persists in GdFeCo for at least some picoseconds after optical excitation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::862deb30a8ed1f6d656817587c1e6620 https://doi.org/10.1103/physrevb.85.092401 Zobrazit plný text záznamu