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Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography
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Bound states in the continuum in plasmonic structures.

Yao Liang1, Sergei Lepeshov2, Kirill Koshelev3

  • 1City University of Hong Kong, Department of Electrical Engineering, Kowloon, 0055, Hong Kong.

Reports on Progress in Physics. Physical Society (Great Britain)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

Bound states in the continuum enable sharp resonances in plasmonic nanostructures, overcoming inherent losses. This research explores their applications in lasing, sensing, and nonlinear optics.

Keywords:
bound states in the continuumhigh Q resonancesmetaphotonicsmetasurfacesoptical nanoantennas

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Area of Science:

  • Photonics and Nanotechnology
  • Wave Physics

Background:

  • Resonant effects in subwavelength photonic systems are typically studied in low-loss dielectric structures.
  • Bound states in the continuum (BIC) is a general wave phenomenon with potential in lossy systems.
  • Metal-dielectric structures supporting surface plasmon polaritons (SPPs) usually suffer from optical losses, hindering sharp resonances.

Purpose of the Study:

  • To summarize recent theoretical and experimental progress in plasmonic bound states in the continuum (BIC).
  • To highlight novel properties and applications of plasmonic BIC, including lasing, sensing, and nonlinear effects.
  • To explore the association of plasmonic surface lattice resonances (SLRs) and Tamm plasmon polaritons (TPPs) with BIC physics.

Main Methods:

  • Review of theoretical studies on bound states in the continuum in plasmonic systems.
  • Analysis of experimental findings related to plasmonic BIC.
  • Investigation of metamaterial analogs like electromagnetically induced transparency (EIT) and Tamm plasmon polaritons (TPPs).

Main Results:

  • Plasmonic systems can exhibit sharp resonances through BIC physics, despite inherent losses.
  • Plasmonic surface lattice resonances (SLRs) and Tamm plasmon polaritons (TPPs) are closely linked to bound states in the continuum.
  • BIC in plasmonic nanostructures offer novel tools for creating sharp resonances.

Conclusions:

  • Plasmonic bound states in the continuum present significant opportunities for high-Q resonant systems.
  • Further research in plasmonic BIC can lead to advancements in novel physics and applications like lasing and sensing.
  • The study of plasmonic BIC opens new avenues in metamaterials and nanophotonics.