Figure 5.

Cross‐spectral density ${\mathrm{\Delta }}_x^2{\mathrm{\Delta }}_y^2{(W_{d^{+}})}_{k{k}^{\prime }}(\mathbf{u})$ in the CdTe model for broad‐spectrum illumination, along the positive u axis up to the Nyquist frequency ($1{\text{mm}}^{-1}$). Each column of plots represents one k and each curve one $k^{\prime }$. The lower row contains close‐up views of the upper plots. Note that each cross‐term is plotted twice since ${(W_{d^{+}})}_{k{k}^{\prime }}(\mathbf{u})$ is symmetric in k and $k^{\prime }$. [Color figure can be viewed at wileyonlinelibrary.com]