Vectorial Fluorescence Control with Light‐Emitting Metasurfaces for Unidirectional Emission and Incoherent Holography

Ultracompact light emission manipulation is crucial for various applications, including illumination, biosensing, and quantum photonics. Despite significant advancements in lasing manipulation, achieving complex vectorial wavefront control over fluorescence emission is inherently challenging due to its incoherent, omnidirectional, unpolarized, and phase-random emission characteristics. Here, the light-emitting metasurfaces (LEMs), equipped with vectorial manipulation and complex amplitude encoding capabilities, are introduced to realize unidirectional emission and incoherent photoluminescence (PL) holography. Through engineering the interaction between the LEM and guided PL, the diffraction angle, linear polarization state, and emission intensity of PL unidirectional emission are independently controlled. Furthermore, the phase encoding capability of LEM, combined with the enhanced spatial coherence of guided PL, experimentally enabled vectorial PL holography alongside polarization-multiplexed nanoprinting. This versatile LEM platform provides a simplified approach to vectorial PL manipulation, promising multiple potential applications in nanophotonics and light-emitting devices.