A conventional quantum eraser involves physical double slits or virtual paths, such as orbital angular momentum, and has been demonstrated to probe the wave-particle duality of light in the quantum optical regime. Here, we extend the concept of the quantum eraser to holographic applications through a geometric-phase metasurface. In this case, we mark hologram paths with polarization using an entangled photon pair. As a result of a quantum holographic eraser, we demonstrate selective erasure of specific hologram regions with various inserted erasers as a visual manifestation of restoring interference. Our work extends the application of metasurfaces in investigating fundamental concepts, including entanglement, non-locality, and the role of information in quantum optics.
Quantum technologies rely on creating and manipulating entangled sources, which are essential for quantum information, communication, and imaging. By integrating quantum technologies and all-dielectric metasurfaces, the performance of miniature display devices can be enhanced to a higher level. Miniature display technology, such as virtual reality display, has achieved original commercial success, and was initially applied to immersive games and interactive scenes. While the consumer market has quickly adopted this technology, several areas remain for improvement, including concerns around bulkiness, dual-channel display, and noise reduction. Here, we experimentally realize a quantum meta-hologram concept demonstration of a miniature display. We fabricate an ultracompact meta-hologram based on 1 μm thick titanium dioxide (TiO2). The meta-hologram can be remotely switched with heralding technique and is robust against noise with the quantum entangled source. The platform can alter the miniature display channel by manipulating heralding photons’ polarization, removing speckles and multiple reflective light noise, improving imaging contrast, and potentially decreasing device weight. Imaging contrast increases from 0.36 dB under speckle noise influences to 6.8 dB in quantum correlation imaging. This approach has the potential to miniaturize quantum displays and quantum communication devices.
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