1 research outputs found
Strong Photoluminescence Enhancement in All-Dielectric Fano Metasurface with High Quality Factor
All-dielectric metamaterials
offer great flexibility for controlling
light–matter interaction, owing to their strong electric and
magnetic resonances with negligible loss at wavelengths above the
material bandgap. Here, we propose an all-dielectric asymmetric metasurface
structure exhibiting high quality factor and prominent Fano line shape.
Over three-orders photoluminescence enhancement is demonstrated in
the fabricated all-dielectric metasurface with record-high quality
factor of 1011. We find this strong emission enhancement is attributed
to the coherent Fano resonances, which originate from the destructive
interferences of antisymmetric displacement currents in the asymmetric
all-dielectric metasurface. Our observations show a promising approach
to realize light emitters based on all-dielectric metasurfaces