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Related Experiment Videos

Strain-Gradient Position Mapping of Semiconductor Quantum Dots.

P-L de Assis1,2, I Yeo1,3, A Gloppe1

  • 1Institut NEEL, CNRS, Univ. Grenoble Alpes, France.

Physical Review Letters
|April 4, 2017
PubMed
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We developed a new way to find semiconductor quantum dots (QDs) in photonic structures. This method uses stress to precisely map QD positions, crucial for quantum technologies.

Area of Science:

  • Materials Science
  • Quantum Physics
  • Nanotechnology

Background:

  • Semiconductor quantum dots (QDs) are vital for quantum technologies.
  • Precisely locating QDs within photonic structures is challenging.
  • Existing methods may be destructive or lack accuracy for embedded QDs.

Purpose of the Study:

  • To introduce a nondestructive method for determining the position of embedded semiconductor quantum dots (QDs).
  • To achieve high-accuracy mapping of QD locations within solid photonic nanostructures.
  • To enable precise characterization of quantum emitters in advanced photonic devices.

Main Methods:

  • Inducing a stress gradient in the photonic structure via controlled oscillation.
  • Exploiting the stress-dependent emission frequency of quantum dots.

Related Experiment Videos

  • Utilizing the emission shifts to map QD positions with high spatial resolution.

    • Main Results:

    • Successfully mapped the positions of randomly distributed semiconductor quantum dots (QDs).
    • Achieved mapping accuracy ranging from ±35 nm down to ±1 nm.
    • Demonstrated the technique on QDs embedded in a photonic wire antenna.

    Conclusions:

    • The developed method offers a nondestructive and highly accurate approach for QD localization.
    • This technique is applicable to various photonic nanostructures and stress-sensitive quantum emitters.
    • The method has significant implications for the advancement of quantum technologies and nanophotonics.