负载金的铋钇铁石榴石（Bi:YIG）复合材料宽带磁光活性增强的近场机制

Near-field mechanism of the enhanced broadband magneto-optical activity of hybrid Au loaded Bi:YIG.

作者信息

Pappas Spiridon D, Lang Philipp, Eul Tobias, Hartelt Michael, García-Martín Antonio, Hillebrands Burkard, Aeschlimann Martin, Papaioannou Evangelos Th

机构信息

Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, 67663 Kaiserslautern, Germany.

出版信息

Nanoscale. 2020 Apr 3;12(13):7309-7314. doi: 10.1039/d0nr00198h.

DOI:10.1039/d0nr00198h

PMID:32202292

Abstract

We unravel the underlying near-field mechanism of the enhancement of the magneto-optical activity of bismuth-substituted yttrium iron garnet films (Bi:YIG) loaded with gold nanoparticles. The experimental results show that the embedded gold nanoparticles lead to a broadband enhancement of the magneto-optical activity with respect to the activity of the bare Bi:YIG films. Full vectorial near- and far-field simulations demonstrate that this broadband enhancement is the result of a magneto-optically enabled cross-talking of orthogonal localized plasmon resonances. Our results pave the way to the on-demand design of the magneto-optical properties of hybrid magneto-plasmonic circuitry.

摘要

我们揭示了负载金纳米颗粒的铋取代钇铁石榴石薄膜（Bi:YIG）磁光活性增强的潜在近场机制。实验结果表明，嵌入的金纳米颗粒相对于裸Bi:YIG薄膜的活性导致了磁光活性的宽带增强。全矢量近场和远场模拟表明，这种宽带增强是正交局域表面等离子体共振的磁光驱动串扰的结果。我们的结果为混合磁等离子体电路磁光特性的按需设计铺平了道路。