Tailoring Emission from Deterministically Localized Colloidal Quantum Dots in Metasurfaces

Tailoring light-matter interaction using photonic modes depends on both the spectral and spatial overlap between the modes and quantum emitters, which is critical for optimizing light-matter coupling and enabling efficient, controllable emission. Here, we demonstrate deterministic control of emission from colloidal quantum dots (CQDs) integrated into dielectric light-emitting metasurfaces (LEMs) by precisely localizing the emitters at the field maxima of the photonic modes across the entire metasurface. Numerical simulations show that deterministic localization enhances the emission, yielding a higher emission enhancement factor than that of LEMs with randomly distributed emitters. Experimentally, such global spatial overlap is achieved using a single-template lift-off process to localize the CQDs at the desired positions. Optical characterization confirms efficient coupling between CQD emission and the photonic modes, resulting in a narrowed spectral linewidth and highly directional out-of-plane emission. Deterministic emission control in metasurfaces adds a new degree of freedom to LEM design, paving the way for an efficient integrated light source for classical and quantum photonic devices.