Out-of-plane symmetry-protected bound states in the continuum in a plasmonic nanofin metasurface

Aigner, AndreasAndreasAignerWang, JuanJuanWangTittl, AndreasAndreasTittlMaier, Stefan A.Stefan A.MaierRen, HaoranHaoranRen2026-03-192026-03-192022-09Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2022https://hdl.handle.net/11420/62260We present a plasmonic nanofin metasurface harnessing the out-of-plane symmetry breaking in parameter space by tuning the triangle angle of 3D laser nanoprinted polymer triangles (named as nanofins) coated with gold. The plasmonic nature of the out-of-plane symmetry-protected BICs enables high field enhancement together with high q-factors from the near- to mid-infrared regions, which were utilised for refractive index and pixelated molecular sensing.enTechnology::600: TechnologyOut-of-plane symmetry-protected bound states in the continuum in a plasmonic nanofin metasurfaceConference Paper10.1364/CLEOPR.2022.CWP16H_01Conference Paper