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Updated: Dec 28, 2025

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Quantum Dot-Plasmon Lasing with Controlled Polarization Patterns.

Jun Guan1, Laxmi Kishore Sagar2, Ran Li3

  • 1Graduate Program in Applied Physics, Northwestern University, Evanston, Illinois 60208, United States.

ACS Nano
|February 13, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed new quantum dot-plasmon lasers for on-chip photonic devices. These lasers offer controllable vector beams, overcoming limitations of bulky optics for applications in microscopy and quantum optics.

Keywords:
band structure engineeringcolloidal quantum dotslattice plasmonsnanolaserradially and azimuthally polarization statessurface lattice resonanceswaveguide

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Quantum Technologies

Background:

  • Tailored spatial polarization of light is crucial for advanced applications like microscopy, biophysics, and quantum optics.
  • Current methods for generating vector beams often require bulky optical elements, hindering the development of miniaturized, on-chip photonic devices.

Purpose of the Study:

  • To engineer miniaturized lasers capable of producing controlled vector beams for integrated photonic applications.
  • To overcome the limitations of conventional lasers that rely on bulky optical components for polarization control.

Main Methods:

  • Utilizing quantum dot-plasmon lasers with engineered polarization patterns.
  • Leveraging near-field coupling between colloidal quantum dots (QDs) and metal nanoparticles.
  • Forming hybrid waveguide-surface lattice resonance (W-SLR) modes via conformal coating of CdSe-CdS core-shell QD films on silver nanoparticle lattices.

Main Results:

  • Demonstrated controllable polarization patterns in laser emission.
  • Successfully formed hybrid W-SLR modes enabling directional lasing.
  • Achieved radial or azimuthal polarization control by adjusting the quantum dot film thickness.

Conclusions:

  • Quantum dot-plasmon lasers offer a pathway to miniaturized, on-chip sources for generating tailored vector beams.
  • Near-field coupling and engineered hybrid modes provide a novel mechanism for precise polarization control in lasers.
  • This technology has significant implications for integrated photonics, microscopy, biophysics, and quantum optics.