Vyas, HardikHardikVyasHegde, Ravi SadanandaRavi SadanandaHegde2025-08-312025-08-312019-04-0110.1117/1.JNP.13.0260042-s2.0-85065484890http://repository.iitgn.ac.in/handle/IITG2025/23314While long-range propagating plasmons have been extensively investigated for implementing on-chip optical sensing platforms, waveguide-excited localized surface plasmon resonance-based sensing systems have not yet received much attention. Waveguide excitation and readout, an alternative to free-space single-particle spectroscopy, are particularly attractive. A numerical investigation of the optical response of a waveuide-excited plasmonic dolmenshaped compound nanoantenna is presented. The dolmen shape is found to offer improved refractive index sensing performance in comparison to simpler shapes for both spectral-shift and intensity-shift measuring modalities. The compound plasmonic nanoantenna configuration presented is of interest in hybrid photonic-plasmonic sensing approaches with high-throughput capabilities.falseCompound plasmonic nanoantenna | Dielectric waveguide | Fano resonance | Plasmonic nanoantenna | Refractive index sensingArticle193426081 April 20193026004arJournal3WOS:000481885100007