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Updated: Jan 15, 2026

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Topological nanorainbow laser.

Shouqi Zhang1, Yongquan Zeng1,2,3, Xing Hong1

  • 1Electronic Information School, Wuhan University, Wuhan 430072, China.

Science Advances
|October 15, 2025
PubMed
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This summary is machine-generated.

Researchers developed a topological nanorainbow laser for compact multiwavelength light emission. This innovation offers high performance and spatial isolation, crucial for advanced photonic applications.

Area of Science:

  • Photonics and Optical Engineering
  • Condensed Matter Physics
  • Quantum Optics

Background:

  • Multiwavelength coherent light sources with spatial isolation are critical for various applications.
  • Achieving precise control over multiple emission wavelengths at the nanoscale presents significant challenges.

Purpose of the Study:

  • To realize a high-performance topological nanorainbow laser.
  • To exploit synthetic dimensions for manipulating optical resonances in photonic crystals.
  • To enable spectrally isolated and spatially dispersed topological synthetic modes.

Main Methods:

  • Utilizing synthetic dimensions in parameter space within a photonic crystal gain system.
  • Designing topological synthetic modes with near-diffraction-limited mode volumes and high-quality factors.

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  • Investigating the optical resonances and emission characteristics of the nanorainbow laser.

    • Main Results:

    • Demonstrated high-performance nanorainbow lasing with a low threshold.
    • Achieved broadband spectrum, large spontaneous emission factor (β), and milliwatt output power simultaneously.
    • Exhibited spectrally and spatially isolated topological synthetic modes with predetermined emission features.

    Conclusions:

    • The topological nanorainbow laser enables high-performance, spatially multiplexed multiwavelength emission.
    • This technology is suitable for on-chip photonics, advancing signal processing and optical computing.
    • The use of synthetic dimensions offers a novel approach to controlling optical resonances in compact systems.