Metasurfaces with single-sized antennas for reconstructing full-color holographic images without cross talk

Designing a color hologram with conventional metasurfaces usually resorts to a supercell strategy or single-sized approach with different incident angles. However, these designs still have their own drawbacks that need to be further solved. Herein, we show a new, to the best of our knowledge, single-sized strategy to design full-color geometric metaholograms by utilizing the conjugation property of two circularly polarized lights with opposite handedness and diffraction dispersion. The experimentally captured holographic color images are reconstructed with high quality and without cross talk, which agrees well with our theoretical prediction. Moreover, only with an appropriate combination of wavelength and polarization state can color images be observed accurately. Our strategy provides a simple and effective approach for full-color meta-holography and offers significant potential in image display, information storage, etc. (C) 2021 Optical Society of America

Automated summary

This study presents a new single-sized strategy for designing full-color geometric metaholograms using the conjugation property of two circularly polarized lights with opposite handedness and diffraction dispersion. Experimental results demonstrate high-quality reconstruction of holographic color images without cross talk.