Publication detail

Observing high-k magnons with Mie-resonance-enhanced Brillouin light scattering

WOJEWODA, O. LIGMAJER, F. HRTOŇ, M. KLÍMA, J. DHANKHAR, M. DAVÍDKOVÁ, K. STAŇO, M. HOLOBRÁDEK, J. KRČMA, J. ZLÁMAL, J. ŠIKOLA, T. URBÁNEK, M.

Original Title

Observing high-k magnons with Mie-resonance-enhanced Brillouin light scattering

Type

journal article in Web of Science

Language

English

Original Abstract

It is of fundamental interest to probe dynamics excitations such as magnons with nanoscale wavelengths in matter. Here, the authors experimentally observe magnons with high k-vectors using Brillouin light scattering microscopy with the use of dielectric nanoresonators, which opens the way for the future nanoscale magnonics research and probing materials with high-momentum photons. Local probing of dynamic excitations such as magnons and phonons in materials and nanostructures can bring new insights into their properties and functionalities. For example, in magnonics, many concepts and devices recently demonstrated at the macro- and microscale now need to be realized at the nanoscale. Brillouin light scattering (BLS) spectroscopy and microscopy has become a standard technique for spin wave characterization, and enabled many pioneering magnonic experiments. However, the conventional BLS cannot detect nanoscale waves due to its fundamental limit in maximum detectable quasiparticle momentum. Here we show that optically induced Mie resonances in nanoparticles can be used to extend the range of accessible quasiparticle's wavevectors beyond the BLS fundamental limit. These experiments involve the measurement of thermally excited as well as coherently excited high momentum magnons. Our findings demonstrate the capability of Mie-enhanced BLS and significantly extend the usability of BLS microscopy for magnonic and phononic research.

Keywords

spin-waves; surface; films

Authors

WOJEWODA, O.; LIGMAJER, F.; HRTOŇ, M.; KLÍMA, J.; DHANKHAR, M.; DAVÍDKOVÁ, K.; STAŇO, M.; HOLOBRÁDEK, J.; KRČMA, J.; ZLÁMAL, J.; ŠIKOLA, T.; URBÁNEK, M.

Released

9. 5. 2023

Publisher

Springer Nature

Location

BERLIN

ISBN

2399-3650

Periodical

COMMUNICATIONS PHYSICS

Year of study

6

Number

1

State

Federal Republic of Germany

Pages from

1

Pages to

10

Pages count

10

URL

https://www.nature.com/articles/s42005-023-01214-z

Full text in the Digital Library

http://hdl.handle.net/11012/213683

BibTex

@article{BUT183980,
  author="Ondřej {Wojewoda} and Filip {Ligmajer} and Martin {Hrtoň} and Jan {Klíma} and Meena {Dhankhar} and Kristýna {Davídková} and Michal {Staňo} and Jakub {Holobrádek} and Jakub {Krčma} and Jakub {Zlámal} and Tomáš {Šikola} and Michal {Urbánek}",
  title="Observing high-k magnons with Mie-resonance-enhanced Brillouin light scattering",
  journal="COMMUNICATIONS PHYSICS",
  year="2023",
  volume="6",
  number="1",
  pages="10",
  doi="10.1038/s42005-023-01214-z",
  issn="2399-3650",
  url="https://www.nature.com/articles/s42005-023-01214-z"
}