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Ultra-thin light-weight laser-induced-graphene (LIG) diffractive optics.

Younggeun Lee1, Mun Ji Low2,3, Dongwook Yang1

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Light, Science & Applications
|June 15, 2023
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Summary

Ultra-thin graphene optics, including planar diffractive lenses (PDLs), offer compact, lightweight solutions for advanced industries. Direct laser writing of laser-induced-graphene (LIG) enables flexible, high-performance hybrid optical systems.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Modern industries require compact, lightweight, and multi-functional optical systems.
  • Planar diffractive lenses (PDLs) can be fabricated on flexible substrates for conformal attachment.
  • Graphene-based optics present a promising avenue for next-generation optical devices.

Purpose of the Study:

  • To review recent advancements in the design and manufacturing of ultra-thin graphene optics.
  • To explore the potential of laser-induced-graphene (LIG) for fabricating PDLs.
  • To highlight the integration of PDLs with conventional optics for hybrid systems.

Main Methods:

  • Direct laser writing (DLW) of laser-induced-graphene (LIG) for PDL patterning.
  • Detailed study of photon-material interactions and laser parameters for optimal optical performance.
  • Fabrication and characterization of 1D and 2D PDL structures, including plasmonic and holographic designs.

Main Results:

  • DLW of LIG offers design flexibility, process simplicity, and chemical-free fabrication for PDLs.
  • Optical characteristics (amplitude and phase) of laser-written PDLs have been evaluated.
  • Demonstrated various PDL structures on different base materials, expanding to plasmonic and holographic applications.

Conclusions:

  • Ultra-thin graphene PDLs are crucial for compact and lightweight optical systems.
  • Hybrid optical systems combining PDLs with conventional optics offer synergistic advantages.
  • Potential applications span micro-electronics, biomedical imaging, space exploration, and extended reality (XR).