How to realize ultimate spatial and temporal resolutions by laser-combined scanning tunneling microscopy?

AbstractBy combining scanning tunneling microscopy (STM) and the optical pump-probe technique using a femtosecond pulse laser, we have developed a new microscopy, shaken pulse-pair-excited STM (SPPX-STM), that enables us to observe the dynamics of electronic structures with the ultimate spatial and temporal resolutions.

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Surface-mediated spin dynamics probed by optical-pump–probe scanning tunneling microscopy

Physical Chemistry Chemical Physics ◽

10.1039/c8cp07786j ◽

2019 ◽

Vol 21 (14) ◽

pp. 7256-7260 ◽

Cited By ~ 2

Author(s):

Zi-Han Wang ◽

Cheul-Hyun Yoon ◽

Shoji Yoshida ◽

Yusuke Arashida ◽

Osamu Takeuchi ◽

...

Keyword(s):

Scanning Tunneling Microscopy ◽

Materials Science ◽

Spin Dynamics ◽

Functional Materials ◽

Surface Effects ◽

Scanning Tunneling ◽

Tunneling Microscopy ◽

Optical Pump ◽

Pump Probe

In current materials science and technologies, surface effects on carrier and spin dynamics in functional materials and devices are of great importance.

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Optical pump-probe scanning tunneling microscopy for probing ultrafast dynamics on the nanoscale

The European Physical Journal Special Topics ◽

10.1140/epjst/e2013-01912-2 ◽

2013 ◽

Vol 222 (5) ◽

pp. 1161-1175 ◽

Cited By ~ 4

Author(s):

S. Yoshida ◽

Y. Terada ◽

M. Yokota ◽

O. Takeuchi ◽

H. Oigawa ◽

...

Keyword(s):

Scanning Tunneling Microscopy ◽

Scanning Tunneling ◽

Ultrafast Dynamics ◽

Tunneling Microscopy ◽

Optical Pump ◽

Pump Probe

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Optical Pump-Probe Scanning Tunneling Microscopy

Hyomen Kagaku ◽

10.1380/jsssj.35.656 ◽

2014 ◽

Vol 35 (12) ◽

pp. 656-661

Author(s):

Hidemi SHIGEKAWA ◽

Shoji YOSHIDA ◽

Osamu TAKEUCHI

Keyword(s):

Scanning Tunneling Microscopy ◽

Scanning Tunneling ◽

Tunneling Microscopy ◽

Optical Pump ◽

Pump Probe

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New delay-time modulation scheme for optical pump–probe scanning tunneling microscopy (OPP-STM) with minimized light-intensity modulation

Japanese Journal of Applied Physics ◽

10.7567/1347-4065/ab1255 ◽

2019 ◽

Vol 58 (SI) ◽

pp. SIIA12

Author(s):

Osamu Takeuchi ◽

Hiroyuki Mogi ◽

Zi-Han Wang ◽

Cheul Hyun Yoon ◽

Atsushi Taninaka ◽

...

Keyword(s):

Light Intensity ◽

Scanning Tunneling Microscopy ◽

Delay Time ◽

Intensity Modulation ◽

Scanning Tunneling ◽

Modulation Scheme ◽

Tunneling Microscopy ◽

Optical Pump ◽

Pump Probe ◽

Time Modulation

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RECENT ADVANCES IN ULTRAFAST TIME-RESOLVED SCANNING TUNNELING MICROSCOPY

Surface Review and Letters ◽

10.1142/s0218625x18410032 ◽

2018 ◽

Vol 25 (Supp01) ◽

pp. 1841003 ◽

Cited By ~ 6

Author(s):

YE TIAN ◽

FAN YANG ◽

CHAOYU GUO ◽

YING JIANG

Keyword(s):

Scanning Tunneling Microscopy ◽

Spatial Resolution ◽

Temporal Resolution ◽

Near Infrared ◽

Atomic Scale ◽

Scanning Tunneling ◽

Tunneling Microscopy ◽

Optical Pump ◽

Time Resolved ◽

Pump Probe

Making smaller and faster functional devices has led to an increasing demand for a microscopic technique that allows the investigation of carrier and phonon dynamics with both high spatial and temporal resolutions. Traditional optical pump–probe methods can achieve femtosecond temporal resolution but fall short in the spatial resolution due to the diffraction limit. Scanning tunneling microscopy (STM), on the contrary, has realized atomic-scale spatial resolution relying on the high sensitivity of the tunneling current to the tip-sample distance. However, limited by the electronics bandwidth, STM can only push the temporal resolution to the microseconds scale, restricting its applications to probe various ultrafast dynamic processes. The combination of these two methods takes advantages of optical pump–probe techniques and highly localized tunneling currents of STM, providing one viable solution to track atomic-scale ultrafast dynamics in single molecules and low-dimensional materials. In this review, we will focus on several ultrafast time-resolved STM methods by coupling the tunneling junctions with pulsed electric waves, THz, near-infrared and visible laser. Their applications to probe the carrier dynamics, spin dynamics, and molecular motion will be highlighted. In the end, we will present an outlook on the challenges and new opportunities in this field.

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