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Related Experiment Video

Updated: Dec 24, 2025

Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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Nanoplasmonically-engineered random lasing in organic semiconductor thin films.

Esmaeil Heydari1, Isabel Pastoriza-Santos, Luis M Liz-Marzán

  • 1Institut für Physik und Astronomie, University of Potsdam, 14476 Potsdam, Germany. stumpe@uni-potsdam.de.

Nanoscale Horizons
|April 9, 2020
PubMed
Summary

We developed a new hybrid material for enhanced organic lasers. Doping organic semiconductors with core-shell plasmonic nanoparticles significantly lowers lasing thresholds and boosts efficiency.

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Area of Science:

  • Materials Science
  • Optics and Photonics
  • Nanotechnology

Background:

  • Organic semiconductors are promising for laser applications.
  • Plasmonic nanoparticles can enhance light-matter interactions.

Purpose of the Study:

  • To demonstrate plasmonically nano-engineered coherent random lasing.
  • To enhance stimulated emission in hybrid organic semiconductor gain media.

Main Methods:

  • Fabrication of a hybrid gain medium: organic semiconductor thin film doped with gold core-silica shell nanoparticles.
  • Characterization of amplified spontaneous emission (ASE) threshold and lasing properties.
  • Tuning of plasmon-exciton coupling by varying silica shell thickness.

Main Results:

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  • Reduced ASE threshold from 1.75 μJ cm-2× 102 to 0.35 μJ cm-2× 102.
  • Obtained lasing spikes narrower than 0.1 nm.
  • Increased laser slope efficiency by two times by decreasing silica shell thickness from 21 nm to 10 nm.

Conclusions:

  • Plasmonic nano-engineering of hybrid gain media offers effective control over lasing properties.
  • Tuning plasmon-exciton coupling via silica shell thickness is crucial for optimizing laser performance.
  • This approach enhances localized electric fields, leading to significant improvements in laser efficiency.