Phys.org August 8, 2023
Traditional control of emission from quantum light sources relies on the use of multiple bulky optical elements or nanostructured resonators with limited functionalities, constraining the potential of multi-dimensional tailoring. An international team of researchers (Australia, South Korea) designed an ultrathin polarisation-beam-splitting metalens for the arbitrary structuring of quantum emission at room temperature. Due to the complete and independent polarisation and phase control at the single meta-atom level, the metalens enabled simultaneous mapping of quantum emission from ultra-bright defects in hexagonal boron nitride and imprinting of an arbitrary wavefront onto orthogonal polarisation states of the sources. The hybrid quantum metalens enabled simultaneous manipulation of multiple degrees of freedom of a quantum light source, including directionality, polarisation, and orbital angular momentum. According to the researchers, this could make available the full potential of solid-state SPEs for their use as high-dimensional quantum sources for advanced quantum photonic applications… read more. Open Access TECHNICAL ARTICLEÂ
Schematics of multidimensional manipulation of hBN quantum emission using a multifunctional metalens… Credit: eLight 3, 19, 7 August (2023)Â