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Updated: Jun 3, 2026
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Laser-combined scanning tunnelling microscopy for probing ultrafast transient dynamics
Yasuhiko Terada1, Shoji Yoshida, Osamu Takeuchi
1Institute of Applied Physics, CREST-JST, University of Tsukuba, Tsukuba 305-8573, Japan.
Summary
Time-resolved scanning tunnelling microscopy (STM) combines ultrafast lasers with STM for atomic-level imaging. This approach aims to achieve unprecedented spatiotemporal resolution for nanoscale dynamics.
Area of Science:
- Surface science
- Nanotechnology
- Ultrafast spectroscopy
Background:
- Scanning tunnelling microscopy (STM) offers atomic resolution but limited time resolution (∼100 kHz).
- Ultrafast laser technology provides femtosecond time resolution but suffers from lower spatial resolution.
- Observing transient phenomena at the nanoscale requires combining high spatial and temporal resolutions.
Purpose of the Study:
- To review the development of time-resolved STM.
- To explore the combination of STM and ultrafast laser technology.
- To achieve ultimate spatiotemporal resolution for nanoscale scientific research.
Main Methods:
- Review of time-resolved scanning tunnelling microscopy (STM) techniques.
- Integration of ultrafast laser systems with STM.
- Analysis of observed physical quantities and spatiotemporal resolution.
Main Results:
- Ultrashort optical pulses enable femtosecond transient phenomenon observation.
- STM provides atomic-level spatial resolution.
- Challenges remain in achieving both high temporal and spatial resolution simultaneously.
Conclusions:
- Combining STM and ultrafast lasers is crucial for exploring ultrafast dynamics in small structures.
- This hybrid technology promises advancements in nanoscale scientific research.
- Future research will focus on optimizing spatiotemporal resolution for quantum function dynamics.
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