All-dielectric metasurfaces for enhancing and tuning the emission of quantum emitters

All-dielectric metasurfaces have been proposed to enhance the emission of electric and magnetic quantum emitters via engineering of high-quality factor optical modes. The excitation of quasi-bound states in the continuum can offer high g-factors in symmetry-broken metasurfaces. However, in most designs, the emission wavelengths are fixed by the geometric parameters of the metasurface. Here, we propose to use phase-change materials to tune the emission of light-emitting metasurfaces supporting quasi-bounds states in the continuum in the telecom spectral range. This work may find applications for tunable spectral shaping, dynamic wavefront shaping, tunable filters, or sensors.