通过单向表面磁谱仪波导阵列控制表面波

IF 2.8 3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Express Pub Date : 2024-03-20 DOI:10.1364/ome.518730
Shiqing Li, Weipu Tu, Hang Zhang, Jinhua Yan, and Linfang Shen
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引用次数: 0

摘要

自由定制表面波(SW)的波面,包括表面等离子体极化子(SPP)及其等效对应物,在片上光子学领域具有重要意义。然而,传统的衍射光学器件往往功能有限,工作效率低。在这里,我们提出了一个新颖的概念,即由精心设计的亚波长间距单向波导狭缝组成的单向表面磁共振(USMP)波导阵列。通过利用 USMP 在这些波导中的独特传播特性,USMP 波导阵列可有效地将 USMP 转换为具有预定波面的 SW。作为对这一概念的证明,我们使用金属-空气-YIG 结构设计了两个微波 USMP 波导阵列,直接将 USMP 转换为具有贝塞尔波束和聚焦波面的 SW。此外,我们还将这一概念扩展到太赫兹领域,利用金属-空气-半导体波导阵列实现了 SW 的波束偏转。这些发现可能有助于开发用于集成光子学应用的高度微型化片上器件。
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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.
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来源期刊
Optical Materials Express
Optical Materials Express MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS
CiteScore
5.50
自引率
3.60%
发文量
377
审稿时长
1.5 months
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.
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