Superpixel-based complex amplitude modulation hologram for compensating the fringing field effect of phase-only spatial light modulators

Phase-only holograms are often loaded onto liquid crystal on silicon (LCOS) spatial light modulators (SLMs) to realize three-dimensional (3D) holographic displays. However, the fringing field effect of LCOS-SLMs severely degrades the reconstruction quality of holograms. Here, we propose an accurate method to measure the crosstalk induced by the fringing field effect of SLMs and present a novel, to the best of our knowledge, superpixel-based complex amplitude modulation hologram solved via gradient descent to compensate for the fringing field effect. Our hologram realizes complex amplitude modulation with a phase-only SLM without increasing the sampling interval, compensates for the crosstalk caused by the fringing field effect, and achieves a high-quality speckle-free color 3D holographic display.