Surface-plasmon opto-magnetic field enhancement for all-optical magnetization switching
US10739261B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2019 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Apr 30, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/0162
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magneto-plasmonic nanostructure is disclosed. The structure includes a substrate, and a magneto-plasmonic stack, comprising a nano-sized plasmonic resonator, a nanomagnet, and a capping layer, wherein the nano-sized plasmonic resonator is configured to receive circularly polarized light at an intensity to thereby increase normal component of plasmon-generated opto-magnetic field, HOM,z, at least at the interface of one of i) the nano-sized plasmonic resonator and the nanomagnet, or ii) the nanomagnet and the capping layer, whereby the HOM,z direction is perpendicular to the rotational direction of the circularly polarized light and the nanomagnets in the magneto-plasmonic stack switches its magnetic moment in response to a change of the HOM,z direction in response to a change of the rotational direction of the circularly polarized light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.