Broadband enhancement of local density of states using silicon-compatible hyperbolic metamaterials

摘要: Light emitting silicon quantum dots by colloidal synthesis were uniformly spin-coated into a 20 nm-thick film and deposited atop hyperbolic metamaterial of alternating TiN SiO2 sub-wavelength layers. Using steady-state time-resolved photoluminescence spectroscopy as function the emission wavelength in partnership with rigorous electromagnetic modeling dipolar emission, we demonstrate enhanced Local Density States coupling to high-k modes broad spectral range. These findings provide an alternative approach for engineering novel Si-compatible broadband sources that leverage control radiative transitions metamaterials flexibility widespread Si platform.