| Literature DB >> 26312732 |
Tian-Min Liu1, Tianhan Wang1, Alexander H Reid1, Matteo Savoini2, Xiaofei Wu3,4, Benny Koene2, Patrick Granitzka1,5, Catherine E Graves1, Daniel J Higley1, Zhao Chen1, Gary Razinskas3, Markus Hantschmann6, Andreas Scherz1, Joachim Stöhr1, Arata Tsukamoto7, Bert Hecht3, Alexey V Kimel2, Andrei Kirilyuk2, Theo Rasing2, Hermann A Dürr1.
Abstract
Single femtosecond optical laser pulses, of sufficient intensity, are demonstrated to reverse magnetization in a process known as all-optical switching. Gold two-wire antennas are placed on the all-optical switching film TbFeCo. These structures are resonant with the optical field, and they create a field enhancement in the near-field which confines the area where optical switching can occur. The magnetic switching that occurs around and below the antenna is imaged using resonant X-ray holography and magnetic circular dichroism. The results not only show the feasibility of controllable switching with antenna assistance but also demonstrate the highly inhomogeneous nature of the switching process, which is attributed to the process depending on the material's heterogeneity.Keywords: All-optical switching; X-ray holography; X-ray magnetic circular dichroism (XMCD); magnetic inhomogeneity; magnetic recording; plasmonics
Year: 2015 PMID： 26312732 DOI： 10.1021/acs.nanolett.5b02743
Source DB: PubMed Journal: Nano Lett ISSN： 1530-6984 Impact factor: 11.189