Coexistence of Surface Lattice Resonances and Bound states In the Continuum in a Plasmonic Lattice

Abstract

We present a numerical study on a 2D array of plasmonic structures covered by a subwavelength film. We explain the origin of surface lattice resonances (SLRs) using coupled dipole approximation and show that the diffraction-assisted plasmonic resonances and formation of bound states in the continuum (BICs) can be controlled by altering the optical environment. Our study shows that when the refractive index contrast is small ( $\Delta$n < -0.1), the SLR cannot be excited, while a significant contrast ($\Delta$n > 0.3) not only sustains plasmonic-induced resonances but also forms both symmetry-protected and accidental BICs. The results can aid the streamlined design of plasmonic lattices in studies on light-matter interaction and applications in biosensors and optoelectronic devices.

References in corpus (14)

• Fano resonances in nanoscale structures
• Resonantly Trapped Bound State in the Continuum Laser
• Colloquium: Light scattering by particle and hole arrays
• Lasing action in active dielectric nanoantenna arrays
• Formation of Bound States in the Continuum in Hybrid Plasmonic-Photonic Systems
• Ultra-high-Q resonances in plasmonic metasurfaces
• Controlling light absorption of graphene at critical coupling through magnetic dipole quasi-bound states in the continuum resonance
• Resonant lattice Kerker effect in metasurfaces with electric and magnetic optical responses
• Diffractive arrays of gold nanoparticles near an interface: critical role of the substrate
• Bose-Einstein Condensation in a Plasmonic Lattice
• Divergence of Dipole Sums and the Nature of Non-Lorentzian Exponentially Narrow Resonances in One-Dimensional Periodic Arrays of Nanospheres
• Screened Strong Coupling of Excitons in Multilayer WS2 with Collective Plasmonic Resonances
• Tailoring dispersion of room temperature exciton-polaritons with perovskite-based subwavelength metasurfaces
• Particle plasmons: Why shape matters