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Multipolar lasing modes from topological corner states.

Ha-Reem Kim1, Min-Soo Hwang1, Daria Smirnova2

  • 1Department of Physics, Korea University, Seoul, 02841, Republic of Korea.

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Summary
This summary is machine-generated.

Researchers demonstrate lasing from corner states in nanophotonic topological structures. This work opens new avenues for designing robust, high-quality light-emitting devices using higher-order topological phases.

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Area of Science:

  • Topological photonics
  • Nanophotonics
  • Quantum optics

Background:

  • Topological photonics offers robust light manipulation with disorder immunity.
  • Active topological cavities with optical gain are promising for light-emitting devices.
  • Higher-order topological phases enable strong light confinement at corners.

Purpose of the Study:

  • To demonstrate lasing action of corner states in nanophotonic topological structures.
  • To investigate multipole corner modes and their emission profiles.
  • To explore selective lasing from edge or corner states.

Main Methods:

  • Fabrication of nanophotonic topological structures.
  • Hyperspectral imaging for mode identification.
  • Optical pumping to induce lasing.

Main Results:

  • Demonstrated lasing from corner states in nanophotonic topological structures.
  • Identified distinct multipole corner modes with unique emission profiles.
  • Observed selective lasing from edge or corner states based on pump position.
  • Discovered signatures of non-Hermitian radiative coupling in leaky topological states.

Conclusions:

  • Direct observation of multipolar lasing in active topological nanostructures.
  • Engineered collective resonances in higher-order topological systems.
  • Potential for advanced light-emitting devices utilizing corner states.