Figure 3
From: Observation of strongly enhanced photoluminescence from inverted cone-shaped silicon nanostructures
Mode analysis.
(a) Radiative power from the modes through the top (
arbitrary units) of the SiNC C4 plotted with respect to the wavelength. The upper (red) and lower (blue) graphs show modes excited by a dipole polarized along the x and z direction (
), respectively. The numbers indicate the peaks corresponding to the modes shown in (d). (b) Circumferences (heights) of the SiNC C4 hosting WGMs. Blue and red symbols correspond to WGMs excited by 
and 
, respectively. Closed and open stars show WGMs visualized in (c) and (d). (c) Characteristic xy cross sections of the energy density for the HE61, HE81, HE101, HE81a and HE101a WGMs. (d) xz and xy cross sections of the energy density for HE101a WGMs hosted at five discrete heights of the structure C4.
