Shiqing Li, Weipu Tu, Hang Zhang, Jinhua Yan, and Linfang Shen
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Surface wave control via unidirectional surface magnetoplasmon waveguide arrays
Freely tailoring the wavefronts of surface waves (SWs), including surface plasmon polaritons (SPPs) and their equivalent counterparts, holds significant importance in the field of on-chip photonics. However, conventional diffraction-optics based devices often suffer from limited functionalities and low working efficiencies. Here, we present a novel concept of a unidirectional surface magnetoplasmon (USMP) waveguide array composed of carefully engineered subwavelength-spaced unidirectional waveguide slits. By utilizing the unique propagation properties of USMPs within these waveguides, the USMP waveguide array efficiently converts USMPs into SWs with predetermined wavefronts. As proof of the concept, we numerically demonstrate this new principle through the design of two microwave USMP waveguide arrays using a metal-air-YIG structure, which directly converts USMPs into SWs with the wavefronts of Bessel beam and focusing. Additionally, we extend this concept to the terahertz regime and achieve beam deflection of SWs using a metal-air-semiconductor waveguide array. These findings may inspire the development of highly miniaturized on-chip devices for integrated photonics applications.
期刊介绍:
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optical Materials Express (OMEx), OSA''s open-access, rapid-review journal, primarily emphasizes advances in both conventional and novel optical materials, their properties, theory and modeling, synthesis and fabrication approaches for optics and photonics; how such materials contribute to novel optical behavior; and how they enable new or improved optical devices. The journal covers a full range of topics, including, but not limited to:
Artificially engineered optical structures
Biomaterials
Optical detector materials
Optical storage media
Materials for integrated optics
Nonlinear optical materials
Laser materials
Metamaterials
Nanomaterials
Organics and polymers
Soft materials
IR materials
Materials for fiber optics
Hybrid technologies
Materials for quantum photonics
Optical Materials Express considers original research articles, feature issue contributions, invited reviews, and comments on published articles. The Journal also publishes occasional short, timely opinion articles from experts and thought-leaders in the field on current or emerging topic areas that are generating significant interest.