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Related Experiment Video

Updated: Jun 13, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Single electron charging in optically active nanowire quantum dots.

Maarten P van Kouwen¹, Michael E Reimer, Anne W Hidma

¹Kavli Institute of Nanoscience, Delft, The Netherlands.

|April 15, 2010

Summary

This summary is machine-generated.

Researchers demonstrate precise control over a single nanowire quantum dot using electric fields. This charge control is crucial for future opto-electrical single electron spin experiments.

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Area of Science:

Condensed Matter Physics
Quantum Information Science

Background:

Quantum dots are essential for quantum computing.
Controlling single electrons in quantum dots is challenging.

Purpose of the Study:

To demonstrate precise charge control of a single nanowire quantum dot.
To enable opto-electrical single electron spin experiments.

Main Methods:

Applied electric fields along the nanowire growth direction to control tunneling.
Used a back-gate to modify the chemical potential.
Combined field effects to isolate a single electron.

Main Results:

Achieved independent tuning of tunnel coupling.
Demonstrated charge tunability of the quantum dot.
Successfully isolated a single electron.

Conclusions:

Precise charge control of nanowire quantum dots is achievable.
This work is a critical step towards opto-electrical spin manipulation.