Focusing laser pulses on sharp metallic tip positioned just above graphene's surface to propogate ultrafast surface waves

https://phys.org/news/2025-01-scientists-ultrafast-surface-graphene.html#google_vignette

"sets electrons in tip in motion, exerting force on graphene's electrons, generating circular electron density wave reflecting off edges travelling back to tip... enables electron wave propagation direct observation in both space/ time with nm resolution... notes its speed, damping, frequency, without complex computational transformations... distinction between wave's center of mass, and individual wave peaks/ troughs propagation, each measurable... higher quality graphene for clock speeds >1,000X faster electronics"