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Topological Dirac-vortex microcavity laser for robust on-chip optoelectronics.

Yuanpeng Wu1, Zetian Mi2

  • 1Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Avenue, Ann Arbor, MI, 48109, USA. ypwu@umich.edu.

Light, Science & Applications
|March 4, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a topological laser using InAs/InGaAs quantum dots on silicon. This Dirac-vortex microcavity laser demonstrates a wide spectral range and stability against size changes.

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Area of Science:

  • Semiconductor Physics
  • Quantum Optics
  • Materials Science

Background:

  • Topological lasers offer enhanced robustness and unique optical properties.
  • Quantum dots provide tunable optoelectronic characteristics.
  • Integration of optoelectronic devices on silicon substrates is a key goal in photonics.

Purpose of the Study:

  • To experimentally realize a Dirac-vortex microcavity laser on a silicon substrate.
  • To investigate the spectral range and robustness of the topological laser.
  • To demonstrate the potential of InAs/InGaAs quantum dots for topological photonic devices.

Main Methods:

  • Fabrication of Dirac-vortex microcavities using InAs/InGaAs quantum dots.
  • Integration of quantum dot microcavities onto a silicon substrate.
  • Characterization of the laser's spectral properties and performance under varying conditions.

Main Results:

  • Successful experimental realization of a Dirac-vortex microcavity laser.
  • Demonstration of a large spectral range for the topological laser.
  • High robustness against variations in cavity size was observed.

Conclusions:

  • Dirac-vortex microcavity lasers based on InAs/InGaAs quantum dots are feasible on silicon.
  • The topological laser design offers significant advantages in spectral range and robustness.
  • This work paves the way for robust topological photonic devices on silicon platforms.