Fig. 10.

Relative change in $\tilde{\mathrm{\Sigma }}$ when (a) lower (${\tilde{\mathrm{\Sigma }}}^l/\tilde{\mathrm{\Sigma }}$) and (b) higher (${\tilde{\mathrm{\Sigma }}}^h/\tilde{\mathrm{\Sigma }}$) LSs are perturbed. Calculation performed for samples with SCF that is experimentally measured from TEM images (blue markers for samples with thickness $1.5\mu \mathrm{m}$ and green for $6.0\mu \mathrm{m}$), and analytically defined as exponential (blue solid line for $L=1.5$ and green dashed for $L=6.0\mu \mathrm{m}$). Reproduced with permission from Ref. 21, courtesy of Opt. Lett.