Externally-triggerable optical pump-probe scanning tunneling microscopy with a time resoloution of tens-picosecond.

ABSTRACT: Photoinduced carrier dynamics of nanostructures play a crucial role in developing novel functionalities in advanced materials. Optical pump-probe scanning tunneling microscopy (OPP-STM) represents distinctive capabilities of real-space imaging of such carrier dynamics with nanoscale spatial resolution. However, combining the advanced technology of ultrafast pulsed lasers with STM for stable time-resolved measurements has remained challenging. The recent OPP-STM system, whose laser-pulse timing is electrically controlled by external triggers, has significantly simplified this combination but limited its application due to nanosecond temporal resolution. Here we report an externally-triggerable OPP-STM system with a temporal resolution in the tens-picosecond range. We also realize the stable

SUBMITTER: Iwaya K 

PROVIDER: S-EPMC9877009 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature