Details

Autor(en) / Beteiligte

• Yang, Aiping
• Lei, Xinrui
• Shi, Peng
• Meng, Fanfei
• Lin, Min
• Du, Luping
• Yuan, Xiaocong

Titel

Spin‐Manipulated Photonic Skyrmion‐Pair for Pico‐Metric Displacement Sensing

Ist Teil von

• Advanced science, 2023-04, Vol.10 (12), p.e2205249-n/a

Ort / Verlag

Germany: John Wiley & Sons, Inc

Erscheinungsjahr

2023

Quelle

Wiley-Blackwell Full Collection

Beschreibungen/Notizen

• Photonic spin skyrmions with deep‐subwavelength features have aroused considerable interest in recent years. However, the manipulation of spin structure in the skyrmions in a desired manner is still a challenge, while this is crucial for developing the skyrmion‐based applications. Here, an approach of optical spin manipulation by utilizing the spin‐momentum equation is proposed to investigate the spin texture in a photonic skyrmion‐pair. With the benefit of the proposed approach, a unique spin texture with spin angular momentum varying linearly along the line connecting the two skyrmion centers is theoretically designed and experimentally verified. The optimized spin texture is then applied in a displacement‐sensing system, which is capable of attaining pico‐metric sensitivity. Compared with the conventional polarization and phase schemes, the spin‐based manipulation mechanism provides a new pathway for optical modulation, which is of great value in nanophotonics from both fundamental and application. A robust, Angstrom‐scaled displacement‐sensing technique is proposed based on the structured spin texture in a photonic skyrmion‐pair, where the interaction between the skyrmions induces a linear change in spin texture within its central region over distances of hundred‐nanometers.