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<p>Metasurfaces supporting bound states in the continuum (BIC) can be leveraged as lasing platforms, offering ultra-compact and highly coherent light sources. Although designs using low-index polymers that do not require etching have been demonstrated and shown to possess remarkably high quality factors for free-space radiation, these have been so far limited to passive designs. Here, we report on highly coherent BIC-based lasing, emerging from etch-free metasurfaces that are directly patterned onto organic supramolecular materials consisting of small-molecule, ionic isolation lattices (SMILES). We observe highly directional lasing with a divergence angle of 0.2°, linewidth of 0.04 nm — limited by the spectral resolution of our measurement setup — and a temporal coherence of 20.4 ± 2.4 ps. The reported performance is a direct consequence of the combination of high-quality metasurface designs with the intrinsic uniformity and stability of SMILES, offering a strategy to realize active metasurfaces and organic molecular lasers, superior to alternative approaches based on solution-processable materials.</p>

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Highly coherent organic lasing based on etch-free metasurface

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月19日

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  • Daegwang Choi,
  • Serena Zachariah,
  • Rishabh Kaurav,
  • Jie Fang,
  • Junsheng Chen,
  • Bo W. Laursen,
  • Amar H. Flood,
  • Arka Majumdar,
  • Andrea Alù,
  • Vinod M. Menon

摘要

Metasurfaces supporting bound states in the continuum (BIC) can be leveraged as lasing platforms, offering ultra-compact and highly coherent light sources. Although designs using low-index polymers that do not require etching have been demonstrated and shown to possess remarkably high quality factors for free-space radiation, these have been so far limited to passive designs. Here, we report on highly coherent BIC-based lasing, emerging from etch-free metasurfaces that are directly patterned onto organic supramolecular materials consisting of small-molecule, ionic isolation lattices (SMILES). We observe highly directional lasing with a divergence angle of 0.2°, linewidth of 0.04 nm — limited by the spectral resolution of our measurement setup — and a temporal coherence of 20.4 ± 2.4 ps. The reported performance is a direct consequence of the combination of high-quality metasurface designs with the intrinsic uniformity and stability of SMILES, offering a strategy to realize active metasurfaces and organic molecular lasers, superior to alternative approaches based on solution-processable materials.