Jiang Tao, Li Yafei, Xu Zhuangzhuang, Qian Xike, Shi Rui, Li Xiufei, Wang Meng, Li Ze
Research Center for Quantum Physics and Technologies, Inner Mongolia University, Hohhot 010021, China.
Key Laboratory of Semiconductor Photovoltaic Technology and Energy Materials of Inner Mongolia Autonomous Region, School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China.
Nanomaterials (Basel). 2025 Jul 31;15(15):1181. doi: 10.3390/nano15151181.
Metasurfaces have drawn extensive research attention for their unique optical properties and vast application potential. Among the various resonant modes induced in metasurfaces, BIC and electric anapole modes stand out as particularly interesting due to their distinctive physical characteristics. In this work, we designed and investigated novel dimeric dumbbell-shaped metasurfaces incorporating two independently tunable asymmetric parameters. This structural innovation enables the simultaneous excitation of both electric anapole and QBIC modes under normally incident MIR illumination. More importantly, by adjusting these two asymmetric parameters, one can independently tune the resonance peaks of the two modes, thereby overcoming the performance limits of conventional single-peak modulation. This metasurface design demonstrates outstanding performance for dielectric environment-sensing applications. We conducted a comprehensive investigation of the sensing sensitivity for dumbbell-shaped metasurfaces of various geometries. Our simulation results show that the circular-shaped configuration achieved high sensitivity, reaching 20,930 GHz/RIU. This work offers a novel design paradigm for multi-mode control and functionalization of metasurface structures.
超表面因其独特的光学特性和巨大的应用潜力而受到广泛的研究关注。在超表面中诱导的各种共振模式中，BIC和电偶极子模式因其独特的物理特性而格外引人注目。在这项工作中，我们设计并研究了包含两个独立可调不对称参数的新型二聚体哑铃形超表面。这种结构创新能够在正常入射的中红外光照下同时激发电偶极子和QBIC模式。更重要的是，通过调整这两个不对称参数，可以独立调节两种模式的共振峰，从而克服了传统单峰调制的性能限制。这种超表面设计在介电环境传感应用中表现出卓越的性能。我们对各种几何形状的哑铃形超表面的传感灵敏度进行了全面研究。我们的模拟结果表明，圆形配置实现了高灵敏度，达到20,930 GHz/RIU。这项工作为超表面结构的多模式控制和功能化提供了一种新颖的设计范例。
