Incorporation of e-h interaction in optical spectra

[ams_nanolab]

Is it possible to incorporate e-h interaction in optical spectra in ATK? As Kubo-Greenwood is a single particle method can some approximate correction factor be included to consider the excitonic states?

[Jess Wellendorff]

Is this what you mean? : http://quantumwise.com/publications/tutorials/item/837-inelastic-transmission

[Anders Blom]

Maybe you can find such an approximation in the literature, but it's not part of the feature set in ATK. If you find a suitable article, do share with the community, and we can consider it for later.