Abstract

Probing and manipulating the spatiotemporal dynamics of hot carriers in nanoscale metals is crucial to a plethora of applications ranging from nonlinear nanophotonics to single-molecule photochemistry. Using a two-color femtosecond pump-probe spectroscopy, the paper reports real-time tracking of hot carrier dynamics in a plasmonic picocavity formed in the tunnel junction of a scanning tunneling microscope, and maps anti-Stokes electronic resonance Raman scattering and four-wave mixing signals from a single graphene nanoribbon to show edge-enhanced nonlinear optical responses.

Abstract

Probing and manipulating the spatiotemporal dynamics of hot carriers in nanoscale metals is crucial to a plethora of applications ranging from nonlinear nanophotonics to single-molecule photochemistry. Using a two-color femtosecond pump-probe spectroscopy, the paper reports real-time tracking of hot carrier dynamics in a plasmonic picocavity formed in the tunnel junction of a scanning tunneling microscope, and maps anti-Stokes electronic resonance Raman scattering and four-wave mixing signals from a single graphene nanoribbon to show edge-enhanced nonlinear optical responses.

Abstract

Probing and manipulating the spatiotemporal dynamics of hot carriers in nanoscale metals is crucial to a plethora of applications ranging from nonlinear nanophotonics to single-molecule photochemistry. Using a two-color femtosecond pump-probe spectroscopy, the paper reports real-time tracking of hot carrier dynamics in a plasmonic picocavity formed in the tunnel junction of a scanning tunneling microscope, and maps anti-Stokes electronic resonance Raman scattering and four-wave mixing signals from a single graphene nanoribbon to show edge-enhanced nonlinear optical responses.

Abstract

Probing and manipulating the spatiotemporal dynamics of hot carriers in nanoscale metals is crucial to a plethora of applications ranging from nonlinear nanophotonics to single-molecule photochemistry. Using a two-color femtosecond pump-probe spectroscopy, the paper reports real-time tracking of hot carrier dynamics in a plasmonic picocavity formed in the tunnel junction of a scanning tunneling microscope, and maps anti-Stokes electronic resonance Raman scattering and four-wave mixing signals from a single graphene nanoribbon to show edge-enhanced nonlinear optical responses.