Direct nano-imaging of light-matter interactions in nanoscale excitonic emitters

Direct nano-imaging of light-matter interactions in nanoscale excitonic emitters

Blog Article

Abstract Strong light-matter interactions in localized nano-emitters placed near metallic mirrors have been widely reported via spectroscopic studies in the optical far-field.Here, we report a near-field nano-spectroscopic study of localized nanoscale emitters on a operation igloo white flat Au substrate.Using quasi 2-dimensional CdSe/CdxZn1-xS nanoplatelets, we observe directional propagation on the Au substrate of surface plasmon polaritons launched from the excitons of the nanoplatelets as wave-like fringe patterns in the near-field photoluminescence maps.

These fringe patterns were confirmed via extensive electromagnetic wave simulations to be standing-waves formed between the tip and the edge-up assembled nano-emitters on the substrate plane.We further report that both light confinement and in-plane emission can be engineered by tuning the surrounding dielectric gruvi golden lager environment of the nanoplatelets.Our results lead to renewed understanding of in-plane, near-field electromagnetic signal transduction from the localized nano-emitters with profound implications in nano and quantum photonics as well as resonant optoelectronics.