The paper presents a significant advancement in metasurface holograms, achieving a diffraction efficiency of up to 80% at 825 nm and a broad bandwidth between 630 nm and 1050 nm. The authors, led by Guoxing Zheng and Thomas Zentgraf, describe the design and fabrication of a geometric metasurface (GEMS) that combines the concept of GEMS for superior phase control with the concept of reflectarrays for high polarization conversion efficiency. The metasurface consists of a ground metal plane, a dielectric spacer layer, and a top layer of antennas. This design allows for the efficient conversion between circularly polarized states, resulting in high diffraction efficiency without complex fabrication processes. The metasurface hologram is demonstrated to maintain the same circular polarization state upon reflection, with a high efficiency of over 80% in a broad wavelength range. The experimental results show high fidelity in the holographic images, with a window efficiency of more than 50% and a 0th-order efficiency of less than 3%. The metasurface hologram is expected to find applications in various fields, including laser holographic keyboards, random spot generators, optical anti-counterfeiting, and laser beam shaping.The paper presents a significant advancement in metasurface holograms, achieving a diffraction efficiency of up to 80% at 825 nm and a broad bandwidth between 630 nm and 1050 nm. The authors, led by Guoxing Zheng and Thomas Zentgraf, describe the design and fabrication of a geometric metasurface (GEMS) that combines the concept of GEMS for superior phase control with the concept of reflectarrays for high polarization conversion efficiency. The metasurface consists of a ground metal plane, a dielectric spacer layer, and a top layer of antennas. This design allows for the efficient conversion between circularly polarized states, resulting in high diffraction efficiency without complex fabrication processes. The metasurface hologram is demonstrated to maintain the same circular polarization state upon reflection, with a high efficiency of over 80% in a broad wavelength range. The experimental results show high fidelity in the holographic images, with a window efficiency of more than 50% and a 0th-order efficiency of less than 3%. The metasurface hologram is expected to find applications in various fields, including laser holographic keyboards, random spot generators, optical anti-counterfeiting, and laser beam shaping.