Optical Topological Quasiparticles in Free Space

Anand Hegde^1*, Han-Ting Lin¹, Chen-Bin Huang¹

¹Institute of Photonics Technologies, National Tsing Hua Univeristy, Hsinchu, Taiwan

* Presenter:Anand Hegde, email:hegdeanand93@gmail.com

We numerically investigate the characteristics of plasmonic merons near a metallic surface, revealing a pivotal height-driven transformation from Neel to Bloch-type. The interplay between plasmonic spin-textures controlled by surface plasmon polaritons (SPPs) in the near field and edge-scattered fields in the far field triggers this phenomenon. We also show that the presence of topological quasiparticles extends beyond SPP-mediated spin-textures into the realm of dielectrics.

Keywords: topological spin-texture, plasmonic meron lattice, quasiparticles, surface plasma polaritons, topological photonics