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Published on: October 2, 2016
A three-dimensional scanning trapped-ion probe
Tobias Sägesser1,2, Shreyans Jain1,2, Pavel Hrmo1,2
1Department of Physics, ETH Zürich, 8093 Zürich, Switzerland.
Science Advances
|June 19, 2026
Summary
Researchers developed a new 3D ion trap sensor for precise surface electric field mapping. This advancement allows detailed analysis of surface imperfections and noise in physical systems.
Area of Science:
- Physics
- Surface Science
- Quantum Sensing
Background:
- Physical system performance is often limited by surface imperfections and undesired fields.
- Trapped ions are sensitive probes of electric fields, but prior methods lacked 3D scanning capabilities.
Purpose of the Study:
- To develop a novel trapped ion sensor enabling three-dimensional spatial scanning.
- To overcome limitations of previous radio-frequency traps and enable isolation from external noise.
Main Methods:
- Utilized a single ion sensor confined by static electric fields for 3D positioning.
- Performed spatial scanning over a 200x200 micrometer area at distances of 50-450 micrometers from a metallic surface.
Main Results:
- Successfully measured static and time-varying electric and magnetic fields.
- Mapped surface charge distributions and characterized surface noise.
- Differentiated between various noise sources with high precision.
Conclusions:
- The static-field ion trap provides unprecedented 3D control for surface analysis.
- This technique significantly expands the capabilities for studying materials, surfaces, and geometries.
- Opens new avenues for surface science research and defect characterization.
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