Unraveling the Ultrafast Hot Electron Dynamics in Semiconductor Nanowires.

ABSTRACT: Hot electron relaxation and transport in nanostructures involve a multitude of ultrafast processes whose interplay and relative importance are still not fully understood, but which are relevant for future applications in areas such as photocatalysis and optoelectronics. To unravel these processes, their dynamics in both time and space must be studied with high spatiotemporal resolution in structurally well-defined nanoscale objects. We employ time-resolved photoemission electron microscopy to image the relaxation of photogenerated hot electrons within InAs nanowires on a femtosecond time scale. We observe transport of hot electrons to the nanowire surface within 100 fs caused by surface band bending. We find that electron-hole scattering substantially influences hot electron cooling during

SUBMITTER: Wittenbecher L 

PROVIDER: S-EPMC7877729 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature