Dual-wavelength multiplexed metasurface holography based on two-photon polymerization lithography

Area of Science:

• Optics and Photonics
• Materials Science
• Nanotechnology

Background:

• Metasurfaces offer subwavelength control of electromagnetic fields for advanced optical functions.
• Conventional meta-device fabrication, like electron beam lithography (EBL), is complex and limits meta-atom height variations.
• Two-photon polymerization (TPP) is a high-precision 3D micro-nano fabrication technique with potential for metasurface manufacturing.

Purpose of the Study:

• To design and fabricate a color dual-wavelength metasurface hologram without spatial multiplexing.
• To demonstrate the use of TPP 3D laser printing for visible-band metasurface fabrication.
• To combine propagation and geometric phases for dual-wavelength control within the same polarization state.

Main Methods:

• Designing a metasurface hologram utilizing both propagation and geometric phase principles.
• Employing two-photon polymerization (TPP) 3D laser printing for fabricating the metasurface.
• Experimentally validating the reconstructed images against theoretical predictions.

Main Results:

• Successful design and fabrication of a color dual-wavelength metasurface hologram using TPP.
• Experimental verification of dual-wavelength control and holographic reconstruction.
• Demonstrated feasibility of TPP for visible-band metasurface preparation.

Conclusions:

• TPP 3D printing is a viable method for creating complex metasurfaces with varying meta-atom heights.
• The developed metasurface hologram shows potential for applications in holographic display, optical encryption, and anticounterfeiting.
• This work bridges advanced 3D printing with metasurface technology for novel optical devices.