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Updated: Jun 9, 2025

A Method to Fabricate Disconnected Silver Nanostructures in 3D
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Lasing in an assembled array of silver nanocubes.

Mindaugas Juodėnas1, Nadzeya Khinevich1, Gvidas Klyvis1

  • 1Institute of Materials Science, Kaunas University of Technology, K. Baršausko St. 59, Kaunas LT-51432, Lithuania. mindaugas.juodenas@ktu.lt.

Nanoscale Horizons
|October 29, 2024
PubMed
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We developed a surface lattice resonance (SLR)-based plasmonic nanolaser using colloidal silver nanocubes. This scalable technology enables efficient lasing with potential applications in diagnostics and integrated photonics.

Area of Science:

  • Plasmonics
  • Nanophotonics
  • Laser Physics

Background:

  • Surface lattice resonances (SLRs) arise from the coupling of plasmonic and photonic modes in ordered nanoparticle arrays.
  • SLRs can provide the necessary optical feedback for stimulated emission in nanolasers.
  • Previous work indicated that perfect nanoparticle arrays are not essential for lasing.

Purpose of the Study:

  • To demonstrate a scalable plasmonic nanolaser utilizing colloidal nanoparticles and SLR.
  • To investigate the use of high-quality silver nanocubes for enhanced plasmonic properties.
  • To achieve efficient lasing with a low threshold and high beam quality.

Main Methods:

  • Fabrication of substrates with single silver nanocubes using capillarity-assisted nanoparticle assembly.

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  • Excitation of surface lattice resonances through nanoparticle arrangement.
  • Integration with a laser dye (pyrromethene-597) for stimulated emission.

    • Main Results:

    • Lasing achieved at 574 nm using silver nanocube arrays and pyrromethene-597.
    • Demonstrated a low lasing threshold (<100 μJ cm⁻²).
    • Obtained a narrow linewidth (<1.2 nm) and low beam divergence (<1 mrad).

    Conclusions:

    • High-quality colloidal nanoparticles enable efficient SLR-based plasmonic nanolasers.
    • Scalable production of these nanolasers is feasible.
    • Potential applications include point-of-care diagnostics, photonic integrated circuits, and optical communications.