• Advanced Photonics
  • Vol. 3, Issue 3, 036001 (2021)
Zhiwei Guo1、2、†、*, Yang Long1、3、*, Haitao Jiang1、2, Jie Ren1、3, and Hong Chen1、2、3
Author Affiliations
  • 1Tongji University, School of Physics Science and Engineering, Shanghai, China
  • 2Tongji University, MOE Key Laboratory of Advanced Micro-Structure Materials, Shanghai, China
  • 3Tongji University, Center for Phononics and Thermal Energy Science, China-EU Joint Lab on Nanophononics, Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Shanghai, China
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    Abstract

    The unidirectional excitation of near-field optical modes is a fundamental prerequisite for many photonic applications, such as wireless power transfer and information communications. We experimentally construct all-electric Huygens and spin metasources and demonstrate anomalous unidirectional excitation of high-k hyperbolic modes in two types of hyperbolic metasurfaces. We use a Huygens metasource to study the unidirectional excitation of hyperbolic bulk modes in a planar hyperbolic metamaterial (HMM). Specifically, unidirectional excitation is the same as that in free space in the vertical direction, but opposite to that in free space in the horizontal direction. This anomalous unidirectional excitation is determined by the anisotropic HMM dispersion. In addition, we use a spin metasource to observe the anomalous photonic spin Hall effect in a planar hyperbolic waveguide. For a near-field source with a specific spin, the guide mode with a fixed directional wave vector is excited due to spin-momentum locking. Because the directions of momentum and energy flows in the HMM waveguide are opposite, the unidirectional excitation of hyperbolic guided modes is reversed. Our results not only uncover the sophisticated electromagnetic functionalities of metasources in the near-field but may also provide novel opportunities for the development of integrated optical devices.
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    Zhiwei Guo, Yang Long, Haitao Jiang, Jie Ren, Hong Chen. Anomalous unidirectional excitation of high-k hyperbolic modes using all-electric metasources[J]. Advanced Photonics, 2021, 3(3): 036001
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    Category: Research Articles
    Received: Mar. 10, 2021
    Accepted: May. 20, 2021
    Posted: May. 25, 2021
    Published Online: Jun. 16, 2021
    The Author Email: Guo Zhiwei (2014guozhiwei@tongji.edu.cn), Long Yang (longyang_123@yeah.net)