AUTHOR=Cai Weiqi , Xuan Lixin , Fan Yuancheng , Yang Ruisheng , Zhang Wenwu , Zhang Qing , Chen Songnan , Ye Zhehao , Zhang Yujing , Fu Quanhong , Zhang Fuli TITLE=Coupled magnetic Mie resonances induced extraordinary optical transmission and its non-linear tunability JOURNAL=Frontiers in Materials VOLUME=10 YEAR=2023 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2023.1207156 DOI=10.3389/fmats.2023.1207156 ISSN=2296-8016 ABSTRACT=

Dielectric metamaterials with low ohmic losses and resonating in the local magnetic mode are preferable for enhancing material non-linearity. Here, we propose and experimentally demonstrate broadband extraordinary electromagnetic transmission (EET) behavior, which is induced by the coupling of magnetic modes of two ceramic cuboids. It is shown that extraordinary electromagnetic transmission behavior through a perforated metal sheet with a subwavelength aperture can be achieved by exciting the first-order magnetic mode Mie resonant coupling of these cuboids. Our findings indicate that the transmission bandwidth and amplitude are dependent on the strength of coupling between the two ceramic cuboids. Additionally, we utilized non-linear effects within the dielectric cuboids to achieve tunable extraordinary electromagnetic transmission behavior. Our results are promising for developing non-linearly tunable microwave devices such as filters and modulators of their strong light-matter interactions.