Plasmon-enhanced Brillouin light scattering spectroscopy for magnetic systems. II. Numerical simulations

Autor(en)

Yurii Demydenko, Taras Vasiliev, Khrystyna O. Levchenko, Andrii V. Chumak, Valeri Lozovski

Abstrakt

Brillouin light scattering (BLS) spectroscopy is a powerful tool for detecting spin waves in magnetic thin films and nanostructures. Despite comprehensive access to spin-wave properties, BLS spectroscopy suffers from the limited wave number of detectable spin waves and the typically relatively low sensitivity. In this paper, we present the results of numerical simulations based on the recently developed analytical model describing plasmon-enhanced BLS. Effective susceptibility is defined for a single plasmonic nanoparticle in the shape of an ellipsoid of rotation, for the sandwiched plasmonic nanoparticles separated by a dielectric spacer, as well as for the array of plasmonic resonators on the surface of a magnetic film. It is shown that the eccentricity of the metal nanoparticles, describing their shape, plays a leading role in enhancing the BLS signal. The optimal conditions for BLS enhancement are numerically defined for gold and silver plasmon systems for photons of different energies. The presented results define the roadmap for the experimental realization of plasmon-enhanced BLS spectroscopy.

Organisation(en)

Nanomagnetismus und Magnonik

Externe Organisation(en)

National Academy of Sciences of Ukraine (NASU), Taras Shevchenko National University of Kyiv (KNU), Erwin Schrödinger Institut

Journal

Physical Review B

Band

111

Anzahl der Seiten

13

ISSN

2469-9950

DOI

https://doi.org/10.1103/PhysRevB.111.014405

Publikationsdatum

04-2024

Peer-reviewed

Ja

ÖFOS 2012

103017 Magnetismus

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7817457c-b0dd-4cba-b0f6-61097ae45d36