Figure 5

(a) The refractive index used in the calculations of \(Q_{\textrm{ext}}\), where the real part \(n_r\) is shown in blue and the imaginary part n is shown in orange. (b) \(Q_{\textrm{ext}}^{\mathrm{semi-capsule}}\) (red dashed line) is reconstructed from a number \(n_{comp}\) basis vectors. The blue lines show different reconstructed \(Q_{\textrm{ext}}^{\mathrm{semi-capsule,r}}\), with a different number of basis vectors used. (c) When the chemistry (determined through the refractive index) used for calculating the 100 \(Q_{\textrm{ext}}^{\textrm{sphere}}\) curves is changed, the reconstruction \(Q_{\textrm{ext}}^{\mathrm{semi-capsule,r}}\) fails at the absorption bands.