Efficient all-optical helicity dependent switching of spins in a Pt/Co/Pt film by a dual-pulse excitation
Abstract
All-optical helicity dependent switching (AO-HDS), deterministic control of magnetization by circularly polarized laser pulses, allows to efficiently manipulate spins without the need of a magnetic field. However, AO-HDS in ferromagnetic metals so far requires many laser pulses for fully switching their magnetic states. Using a combination of a short, 90-fs linearly polarized pulse and a subsequent longer, 3-ps circularly polarized pulse, we demonstrate that the number of pulses for full magnetization reversal can be reduced to 4 pulse pairs in a single stack of Pt/Co/Pt. The obtained results suggest that the dual-pulse approach is a potential route towards realizing efficient AO-HDS in ferromagnetic metals.
- Publication:
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arXiv e-prints
- Pub Date:
- March 2019
- DOI:
- 10.48550/arXiv.1903.01941
- arXiv:
- arXiv:1903.01941
- Bibcode:
- 2019arXiv190301941Y
- Keywords:
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- Condensed Matter - Materials Science;
- Physics - Optics
- E-Print:
- 11 pages, 3 figures