Abstract

Photon- and plasmon-induced hot carriers dominate the ultrafast response of metallic nano- and heterostructures and determine the efficiency of fundamental processes in photochemistry and light-harvesting. Here, we introduce our new approach to disentangle the dynamics of plasmon- and photon-induced hot carriers at metal surfaces by combining time-resolved two-photon photoemission electron microscopy and momentum microscopy. In this way, we can disentangle the momentum space signatures of plasmon- and photon-induced hot carriers of gold flakes by their respective spatial and temporal dynamics. In addition, we will discuss the tuneablity of the ultrafast photon-induced carrier dynamics of metallic bilayer systems in momentum space.

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