Investigation of ultrafast excited-state dynamics at the nanoscale with terahertz field-induced electron tunneling and photon emission

• DOI: 10.1063/5.0144218
• Publication Date: 2023-03-17T09:33:41Z
• Authors: Ikufumi Katayama; Kensuke Kimura; Hiroshi Imada; Yousoo Kim; Jun Takeda

The combination of terahertz (THz) pulses with scanning tunneling microscopy (STM) enables us to investigate ultrafast dynamics at material surfaces high spatial (nanoscale) and temporal (femtosecond) resolution. In this Perspective, we review the basic principles THz-STM, outline related literature, discuss its future outlook capable advancing nanoscience, especially by introducing further THz-STM luminescence spectroscopy, which can extract more fruitful information about nanoscale materials via obtaining spectra compared just observing net current induced THz in THz-STM. By shining onto an STM tip, observe plasmon locally confined between tip surface, whose spectrum changes conditions. combined approach is a stepping stone toward investigating excited-state spatiotemporal