Affiliation:
1. State Key Laboratory of Microwave Photonics College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
2. The 54th Research Institute of CETC Shijiazhuang 050081 China
3. School of Informatics Xiamen University Xiamen 361005 China
Abstract
AbstractPlasmon hybridization plays a crucial role in subwavelength light control, offering remarkable field enhancement. However, engineering the resonance properties becomes increasingly challenging since the field enhancement generally makes the resonance more sensitive to geometric deformation. To this end, a shape‐immuned hybridization model with localized spoof plasmonic skyrmions in the platform of ultra‐compact spoof plasmonic dimer structures is proposed. Contrary to conventional wisdom, the revealed hybrid systems exhibit shape‐independent resonance properties thanks to the topological nature of localized spoof plasmonic skyrmions. On the other hand, the strong magnetic coupling between skyrmions results in the splitting of the skyrmion resonances into two new resonances (corresponding to bonding and antibonding skyrmions, respectively). The experimental results reflect that the frequency separation of bonding and antibonding skyrmions is extremely sensitive to the coupling distance of dimer structures (with a maximum sensitivity of up to 10.875 GHz mm−1). The findings not only complete the theory of skyrmion hybridization but also apply to novel multimode topological sensors that are compact and highly sensitive to micro‐displacement.
Funder
National Natural Science Foundation of China
Nanjing University of Aeronautics and Astronautics
Six Talent Peaks Project in Jiangsu Province
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials