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Ultra-thin light-weight laser-induced-graphene (LIG) diffractive optics.
Younggeun Lee1, Mun Ji Low2,3, Dongwook Yang1
1Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
Light, Science & Applications
|June 15, 2023
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.
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).
