Xu Hongyang, Xie Xi, Zhang Chuangye, Zhang Yuquan, Yuan Xiaocong, Shen Yijie, Min Changjun
Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Institute of Micro and Nano Optoelectronics & State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen 518060, China.
Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
Nano Lett. 2025 Jul 2;25(26):10611-10618. doi: 10.1021/acs.nanolett.5c02383. Epub 2025 Jun 16.
On-chip optical lattices based on surface plasmon polariton (SPP) fields have been shown to generate diverse novel topologies and potential for sorting nanoparticles. However, the reliance on metallic excitation in SPP systems suffers from heavy ohmic loss and heat buildup. In this work, we propose a magnetic topological lattice based on Bloch surface waves (BSWs) excited on transparent dielectric multilayers, offering ultralong propagation ranges and markedly reduced thermal effects. In contrast to the conventional SPPs, rich topologies appear in the magnetic field and spin vector. Furthermore, large-scale dynamic manipulation as well as size-dependent sorting of nanoparticles is feasible by leveraging the ability to reconfigure lattice topologies via polarization and phase adjustments, which further expands its functional versatility. Our results provide new insight into optical topologies governed by magnetic fields and hold promise for application in other wave systems, including elastic and water waves.
基于表面等离激元极化激元（SPP）场的片上光学晶格已被证明能产生多种新颖的拓扑结构，并具有对纳米颗粒进行分选的潜力。然而，SPP系统对金属激发的依赖存在严重的欧姆损耗和热量积累问题。在这项工作中，我们提出了一种基于在透明介质多层膜上激发的布洛赫表面波（BSW）的磁性拓扑晶格，它具有超长的传播范围和显著降低的热效应。与传统的SPP不同，丰富的拓扑结构出现在磁场和自旋矢量中。此外，通过利用通过偏振和相位调整重新配置晶格拓扑结构的能力，对纳米颗粒进行大规模动态操纵以及基于尺寸的分选是可行的，这进一步扩展了其功能的通用性。我们的结果为受磁场控制的光学拓扑结构提供了新的见解，并有望应用于其他波动系统，包括弹性波和水波。
