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Related Experiment Video

Updated: Oct 14, 2025

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Ultrafast Photon-Induced Tunneling Microscopy.

Manish Garg¹, Alberto Martin-Jimenez¹, Yang Luo¹

¹Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany.

|November 1, 2021

Summary

This summary is machine-generated.

Ultrafast photon-induced tunneling microscopy tracks electron motion in real time and space. This technique achieves angstrom spatial and sub-femtosecond temporal resolution for molecular systems.

Keywords:

4D tunneling microscopy angstrom−femtosecond resolution atomic space−time resolution ultrafast optical STM techniques ultrashort pulses

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Area of Science:

Ultrafast science
Scanning tunneling microscopy
Molecular dynamics

Background:

Combining ultrafast science and scanning tunneling microscopy (STM) enables real-time, real-space tracking of electronic motion.
STM junctions interact with laser pulses in weak-field (perturbative) or strong-field (dressing) regimes.

Purpose of the Study:

To define the fundamental framework of ultrafast photon-induced tunneling microscopy.
To establish a method for controlling photon-electron interactions within an STM junction.
To introduce techniques for detecting photon-induced tunneling currents.

Main Methods:

Describing photon interaction with an STM junction in ultrashort pulses.
Utilizing selective dipole coupling controlled by DC bias.
Implementing dispersion, polarization, and frequency modulation for lock-in detection of photon-induced currents.

Main Results:

Established ultrafast tunneling microscopy involving photons.
Demonstrated control over electronic state coupling via DC bias.
Achieved angstrom-scale spatial and sub-femtosecond temporal resolution.

Conclusions:

Ultrafast photon-induced tunneling microscopy offers direct probing of electron dynamics in complex molecular systems.
This technique eliminates the need for reconstruction methods.
It paves the way for advanced studies in molecular electronics and quantum dynamics.