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Updated: May 27, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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Chiral Bismuth Halide Metasurfaces for Enhanced Second Harmonic Generation.

Stepan Ilin1,2, Yanchao Yang1, Tangkun Han1

  • 1Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao 266000, Shandong China.

The Journal of Physical Chemistry Letters
|May 25, 2026
PubMed
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This summary is machine-generated.

Chiral bismuth halides integrated with metasurfaces boost light-matter interactions for efficient nonlinear nanophotonics. This approach enhances second-harmonic generation (SHG) in cost-efficient, nontoxic materials for future photonic devices.

Area of Science:

  • Optoelectronics
  • Materials Science
  • Nanophotonics

Background:

  • Hybrid organic-inorganic metal halides offer tunable optical properties and solution processability.
  • Chiral bismuth halides exhibit strong second-order nonlinear susceptibility, stability, and low toxicity, ideal for nonlinear nanophotonics.
  • Efficient second-harmonic generation (SHG) in thin films is often hindered by weak light-matter interactions.

Purpose of the Study:

  • To enhance light-matter interactions for efficient SHG in chiral bismuth halide thin films.
  • To develop a scalable fabrication method for integrating chiral bismuth halides with nanophotonic structures.
  • To establish a novel platform for cost-efficient, nontoxic nonlinear photonic devices.

Main Methods:

  • Integration of a chiral bismuth iodide (R-MBA)BiI4 with a nonlocal metasurface.

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Last Updated: May 27, 2026

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  • Fabrication of the metasurface using femtosecond laser ablation.
  • Characterization of SHG enhancement in visible and infrared ranges.

    • Main Results:

    • The resonant metasurface significantly enhances SHG compared to unpatterned films.
    • Guided mode resonances were achieved in both visible and infrared spectral ranges.
    • Demonstrated a scalable and versatile fabrication technique for the metasurface.

    Conclusions:

    • The resonant metasurface effectively overcomes limitations of weak light-matter interaction in chiral bismuth halide thin films.
    • This work presents a new platform for developing efficient nonlinear photonic devices using solution-processed, nontoxic materials.
    • The findings pave the way for advanced applications in nonlinear nanophotonics.