Plasmonic skyrmions with bound states in the continuum
Zhen Liao,
Chenhao Huang,
Leilei Liu,
Kai-Da Xu,
Siyuan Luo,
Baicao Pan,
Jiusheng Li,
Guo Qing Luo
Affiliations
Zhen Liao
National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology, College of Electronic and Optical Engineering and College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, China
Chenhao Huang
Key Laboratory of RF Circuits and System of Ministry of Education, Hangzhou Dianzi University, Hangzhou 310018, China
Leilei Liu
National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology, College of Electronic and Optical Engineering and College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, China
Kai-Da Xu
School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Siyuan Luo
Microsystem and Terahertz Research Center, China Academy of Engineering Physics (CAEP), Chengdu 610200, China
Baicao Pan
Key Laboratory of RF Circuits and System of Ministry of Education, Hangzhou Dianzi University, Hangzhou 310018, China
Jiusheng Li
Centre for THz Research, China Jiliang University, Hangzhou 310018, China
Guo Qing Luo
Key Laboratory of RF Circuits and System of Ministry of Education, Hangzhou Dianzi University, Hangzhou 310018, China
Plasmonic skyrmions are a subject of significant interest due to their potential applications in optics, photonics, and electromagnetic wave technology. These skyrmions are created by the interference of surface plasmon polaritons or spoof localized surface plasmons (SLSP), offering new possibilities for controlling light–matter interactions and structuring light. In this study, we have demonstrated the generation of both electric and magnetic skyrmions simultaneously using a rotational symmetric SLSP spiral meta-structure lattice, operating across a broad range from microwave to terahertz frequencies. By implementing them into a resonance configuration of the quasi-bound state in the continuum through symmetry breaking, we enhance the Q factor and fields, resulting in highly sensitive sensing performance. The SLSP metasurface enables tunable plasmonic skyrmions controlled by the incident polarization. Our findings have potential applications in highly sensitive sensing, filtering, modulation, and communication.
