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Updated: Mar 26, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
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Photon Cascade from a Single Crystal Phase Nanowire Quantum Dot.

Maaike Bouwes Bavinck1, Klaus D Jöns1, Michal Zieliński2

  • 1Kavli Institute of Nanoscience, Delft University of Technology , 2600 GA Delft, The Netherlands.

Nano Letters
|January 26, 2016
PubMed
Summary

Crystal phase quantum dots in InP nanowires emit pure single-photons and photon-pairs. Their unique crystal structure offers precise control for advanced quantum optics and single-photon applications.

Keywords:
Crystal phase quantum dotInPnanowiretwo-photon cascaded emissiontype II transition

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Area of Science:

  • Quantum Optics
  • Materials Science
  • Nanotechnology

Background:

  • Crystal phase quantum dots (CPQDs) leverage crystallographic transitions (zinc blende and wurtzite) for precise control.
  • Alloying in quantum dots often introduces randomness, limiting precise property tuning.

Purpose of the Study:

  • To conduct a comprehensive experimental and theoretical investigation of the optical properties of CPQDs in InP nanowires.
  • To demonstrate the potential of CPQDs for quantum optical applications.

Main Methods:

  • Experimental characterization of optical properties.
  • Theoretical modeling to explain observed phenomena, focusing on electronic structure and symmetry.

Main Results:

  • CPQDs serve as a source of pure single-photons and cascaded photon-pairs from type II transitions.
  • Observed excellent optical properties, including high intensity and narrow line width.
  • Explained dual-peak emission spectra through theoretical analysis of symmetry's role in hole level hybridization.

Conclusions:

  • CPQDs exhibit promising quantum optical properties for single-photon applications.
  • The precise control offered by CPQDs is advantageous for quantum optics.
  • Symmetry plays a critical role in the optical behavior of these systems.