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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU148484" target="_blank" >RIV/00216305:26620/23:PU148484 - isvavai.cz</a>

Result on the web

<a href="https://www.nature.com/articles/s42005-023-01214-z" target="_blank" >https://www.nature.com/articles/s42005-023-01214-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s42005-023-01214-z" target="_blank" >10.1038/s42005-023-01214-z</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

COMMUNICATIONS PHYSICS

ISSN

2399-3650

e-ISSN

—

Volume of the periodical

6

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000984908900003

EID of the result in the Scopus database

2-s2.0-85159003972