Inverse-designed metasurfaces for wavefront restoration in under-display camera systems.

Area of Science:

• Optics and Photonics
• Materials Science
• Consumer Electronics

Background:

• Under-display camera (UDC) systems offer seamless full-screen smartphone displays.
• Display pixel structures cause optical diffraction, leading to imaging artifacts and reduced quality.
• Current software-based solutions for UDC distortion are computationally intensive and not real-time viable.

Purpose of the Study:

• To develop a real-time, software-free optical solution for diffraction-induced distortions in UDC systems.
• To restore wavefronts and enhance imaging quality for UDCs using metasurfaces.
• To overcome the limitations of conventional, computationally expensive image processing techniques.

Main Methods:

• Inverse design of a metasurface for wavefront restoration.
• Fabrication and characterization of the metasurface.
• Integration and testing of the metasurface within a UDC system simulation or prototype.

Main Results:

• The metasurface effectively suppresses higher-order diffraction modes from metallic pixel structures.
• Optical wavefront restoration is achieved, significantly enhancing imaging quality.
• The solution operates effectively across multiple wavelengths without external software processing.

Conclusions:

• The proposed inverse-designed metasurface provides a scalable, real-time optical solution for diffraction management in UDC systems.
• This approach eliminates the need for software-based post-processing, enabling efficient image restoration.
• The technology has potential applications in various industrial fields requiring real-time image quality enhancement.