Ultracompact polarization multiplexing meta-combiner for augmented reality display.

Area of Science:

• Optics and Photonics
• Materials Science
• Display Technology

Background:

• Augmented reality (AR) displays overlay virtual images onto real-world views, revolutionizing interaction.
• Current AR devices face challenges with bulkiness and long-term wearability due to traditional optical components.
• Metasurfaces offer subwavelength control of light, presenting a promising alternative for miniaturizing optical elements.

Purpose of the Study:

• To propose and fabricate a novel reflective polarization multiplexing gradient metasurface.
• To replace conventional optical combiners in AR display systems with a metasurface-based solution.
• To enable lightweight and comfortable next-generation AR products.

Main Methods:

• Design and fabrication of a gradient metasurface utilizing the propagation phase principle.
• Development of a reflective metasurface with polarization multiplexing capabilities.
• Characterization of the metasurface's optical performance for reflected and transmitted light.

Main Results:

• The designed metasurface demonstrates distinct polarization modulations for reflected and transmitted light.
• Efficient deflection of reflected light is achieved while minimizing impact on transmitted light.
• Successful fabrication of the novel reflective polarization multiplexing gradient metasurface.

Conclusions:

• Metasurfaces hold significant potential for advancing next-generation optical display systems, particularly AR.
• The developed metasurface provides a foundation for integrated waveguide schemes in AR displays.
• This research drives the development of more compact, lightweight, and comfortable AR devices.