Work

Tunable unidirectional large-area surface magnetoplasmons in a stratified waveguide

Year: 2025

Type: article

Abstract: Large-area unidirectional modes have attracted increasing attention due to their potential applications in wave manipulation; however, most implementations are constrained by poor adjustment capability or narrow operating bandwidth, since minor structural parameter changes may significantly affect the one-way propagation range. In this work, we propose and investigate a robust and broadband unidirectional large-area surface magnetoplasmon (LSMP) mode in a stratified waveguide consisting of magnetized yttrium iron-garnet, air, and ? -negative materials. Through theoretical analysis and numerical simulations, we demonstrate that the electric field with uniform amplitude and a nearly flat phase profile can be achieved in the tunable one-way range by adjusting the filling ratio of ? -negative materials. Relying on this unique electric field distribution, we demonstrate beam focusing, Bessel beam generation, and an adjustable beam splitter using LSMP modes. These results are expected to be applied in the field of all-optical communication and imaging, such as efficient holographic imaging.

Source: Optics Express

DOI: 10.1364/oe.563713

Authors: Qian Shen, Yun You, Zhengming Tang, Jinwei Gao, Jie Xu

Institutions: China West Normal University, East China Jiaotong University

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Luzhou Science and Technology Bureau