Speaker
Description
While color down-conversion (DC) is poised to replace costly pick-and-place assembly for mass-producing RGB microLED displays, it currently faces critical bottlenecks: inefficient color conversion and uncollimated emission, particularly as pixel dimensions shrink below 2 μm. Current industry workarounds, such as thick quantum dot (QD) plates or complex vertical stacking, introduce significant thermal, cost, and optical compromises. To overcome these limitations, we demonstrate the integration of an all-dielectric metasurface engineered to systematically amplify the absorption and conversion efficiency of QD color converters. By designing the metasurface to support highly localized resonant modes, we significantly enhance light-matter interactions within the active medium. Experimentally, this approach yields absorption increases of 1.96x and 1.65x for green and red emitting QDs, respectively. Consequently, overall color conversion efficiency improves by 24% (green) and 15% (red) compared to planar references. These findings establish resonant all-dielectric metasurfaces as a scalable, competitive solution to current DC bottlenecks.