Enhanced Figure of Merit via Hybridized Guided?Mode Resonances in 2D?Metallic Photonic Crystal Slabs

Metallic nanostructures are highly attractive for refractive index sensing, as the evanescent field from associated plasmonic resonances resides in close proximity to adjacent analyte media. However, this benefit is often reduced due broad lineshapes producing poor quality factors. The rational design provides strategies narrowing modes by incorporating photonic diffraction, which promotes surface lattice . Due stringent parametric dependencies, these metallic lattices not always feasible, particularly when a straightforward fabrication route with fewer process steps desired. Herein, hybridized guided-mode resonance 2D-metallic crystal slab (2D-mPhCs) introduced that ensures high-quality hybrid while maintaining simple methodology. In direct comparison its constituent and modes, concept discussed sensing applications. “figure of merit (FOM)” frequently regarded valid metric measuring performanceensuring an improved detection limit. experimental results confirm enhanced FOM (three six times) contrast counterparts. For optoelectronic applications, such photodetection photocatalysis, structures offer promising platform harvest light at metal–semiconductor interfaces.