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High-symmetry points in plasmonic lattices

This talk will describe how strongly coupled plasmonic nanoparticle arrays can support high-quality optical modes at high-symmetry points in their photonic band structure. These collective lattice excitations, often called surface lattice resonances (SLRs), show flat-banded modes whose mechanistic origins depend on the nature of the localized plasmon resonance of the constituent nanoparticles. Access to these high-symmetry modes is now possible because of advances in scalable nanofabrication processes.