Plasmon–Exciton Coupling Effect on Plasmon Damping

Plasmon decay via the surface or interface is a critical process for practical energy conversion and plasmonic catalysis. However, relationship between plasmon damping coupling 2D materials still unclear. The spectral splitting due to plasmon–exciton interaction impedes conventional single-particle method evaluate rate by linewidth. single gold nanorod using spectroscopy technique assisted with in situ nanomanipulation investigated. approach allows indisputably identify that would induce GNR–WSe2 hybrid. It confirmed resonant transfer channel dominates rather than charge GNR–graphene hybrid first. contribution of thin hBN layers as an intermediate medium block excluded. also found contact layer GNR contributes most interfacial damping. These findings contribute deep understanding excitonic effects on