Real-time tracking of coherent oscillations of electrons in a nanodevice by photo-assisted tunnelling.

ABSTRACT: Coherent collective oscillations of electrons excited in metallic nanostructures (localized surface plasmons) can confine incident light to atomic scales and enable strong light-matter interactions, which depend nonlinearly on the local field. Direct sampling of such collective electron oscillations in real-time is crucial to performing petahertz scale optical modulation, control, and readout in a quantum nanodevice. Here, we demonstrate real-time tracking of collective electron oscillations in an Au bowtie nanoantenna, by recording photo-assisted tunnelling currents generated by such oscillations in this quantum nanodevice. The collective electron oscillations show a noninstantaneous response to the driving laser fields with a T₂ decay time of nearly 8 femtoseconds. The contrib

SUBMITTER: Luo Y 

PROVIDER: S-EPMC10864318 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature