A 160 {\deg} x 160 {\deg} Dynamic Holographic Meta-Projector

TL;DR

This paper introduces a holographic meta-projector that significantly expands the field-of-view to 160° x 160°, enabling high-resolution, full-screen dynamic holographic displays for virtual and augmented reality applications.

Contribution

It presents a novel pixel-interpolation-assisted design integrating metasurface pixels within traditional SLM pixels to achieve ultra-wide FOV holography.

Findings

Achieved 160° x 160° FOV in dynamic holography

Demonstrated high framerate of 60 Hz for real-time display

Surpassed previous FOV limitations of 70° x 70°

Abstract

Holography can reconstruct immersive light fields for virtual and augmented reality by modulating optical wavefront. Due to huge pixel sizes, current spatial light modulators (SLMs) have small field-of-view (FOV) for holographic displays. Despite various methods for etendue expansion, the largest full-screen FOV for dynamic holography is only 70 {\deg} X 70 {\deg}, which remains insufficient for large-scale, high-resolution, three-dimensional displays. Here, we report a pixel-interpolation-assisted holographic meta-projector that substantially expands the FOV by integrating multiple subwavelength metasurface pixels within each microscale pixel of a traditional SLM. Leveraging large-angle diffraction of the metasurface and implementing k-space distortion correction for ultra-wide angles, we experimentally demonstrate dynamic holographic image reconstruction with a FOV of 160 {\deg} X 160 {\deg} -equivalent to a system numerical aperture of 0.985-at a high framerate of 60 Hz, surpassing the temporal resolution threshold of human vision. This system represents the state-of-the-art near-full-screen holographic dynamic display, thereby opening the door to high-dynamic-range and large-FOV holographic displays.