Terahertz Scanning Tunneling Microscopy for Visualizing Ultrafast Electron Motion in Nanoscale Potential Variations Article Swipe
Shoji Yoshida
,
Yusuke Arashida
,
Hideki Hirori
,
Takehiro Tachizaki
,
Atsushi Taninaka
,
Hiroki Ueno
,
Osamu Takeuchi
,
Hidemi Shigekawa
·
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.1021/acsphotonics.0c01572
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.1021/acsphotonics.0c01572
Studying the microscopic behavior of free carriers in materials at an ultrashort time scale is critical to developing semiconductor, optoelectronic, and other technologies satisfying the ever-increasing requirements for smaller sizes and higher speeds. Understanding the effect of local potential modulations and localized states due to nanoscale microstructures on carrier dynamics is essential to realize these requirements. Here, we used time-resolved scanning tunneling microscopy/spectroscopy (STM/STS) combined with a carrier-envelope phase (CEP)-controlled subcycle THz electric field, THz-STM, to probe the ultrafast motion of electrons photoinjected into C60 multilayer structures grown on Au substrate. We have succeeded in demonstrating the time-resolved measurement of ultrafast electron dynamics with sub-nanoscale spatial resolution and subcycle time resolution for the first time and successfully visualized the electron motion triggered by the spatial variation in the lowest unoccupied molecular orbital (LUMO). The difference in the effects of molecular defects, such as a molecular vacancy and orientational disorder, was also clearly distinguished with single-molecular-level spatial resolution. This method is expected to play an important role in the precise evaluation of local electronic structures and dynamics for the future development of new functional materials and device elements.
Related Topics
Concepts
Ultrashort pulse
Scanning tunneling microscope
Materials science
Terahertz radiation
Electron
Near-field scanning optical microscope
Semiconductor
Optoelectronics
Nanoscopic scale
Microscopy
Spectroscopy
Optics
Molecular physics
Nanotechnology
Physics
Scanning electron microscope
Optical microscope
Laser
Quantum mechanics
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1021/acsphotonics.0c01572
- https://pubs.acs.org/doi/pdf/10.1021/acsphotonics.0c01572
- OA Status
- hybrid
- Cited By
- 67
- References
- 30
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W3119386788
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
-
https://openalex.org/W3119386788Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1021/acsphotonics.0c01572Digital Object Identifier
- Title
-
Terahertz Scanning Tunneling Microscopy for Visualizing Ultrafast Electron Motion in Nanoscale Potential VariationsWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2021Year of publication
- Publication date
-
2021-01-08Full publication date if available
- Authors
-
Shoji Yoshida, Yusuke Arashida, Hideki Hirori, Takehiro Tachizaki, Atsushi Taninaka, Hiroki Ueno, Osamu Takeuchi, Hidemi ShigekawaList of authors in order
- Landing page
-
https://doi.org/10.1021/acsphotonics.0c01572Publisher landing page
- PDF URL
-
https://pubs.acs.org/doi/pdf/10.1021/acsphotonics.0c01572Direct link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
hybridOpen access status per OpenAlex
- OA URL
-
https://pubs.acs.org/doi/pdf/10.1021/acsphotonics.0c01572Direct OA link when available
- Concepts
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Ultrashort pulse, Scanning tunneling microscope, Materials science, Terahertz radiation, Electron, Near-field scanning optical microscope, Semiconductor, Optoelectronics, Nanoscopic scale, Microscopy, Spectroscopy, Optics, Molecular physics, Nanotechnology, Physics, Scanning electron microscope, Optical microscope, Laser, Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
67Total citation count in OpenAlex
- Citations by year (recent)
-
2025: 10, 2024: 14, 2023: 19, 2022: 15, 2021: 9Per-year citation counts (last 5 years)
- References (count)
-
30Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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