Multi-photon schemes for mid-infrared detection : Comparative study of bulk GaAs and Ge${}_{1-x}$Sn${}_x$

Alistair H. Duff, J. E. Sipe

We calculate the theoretical non-degenerate two photon absorption and three color injected current response tensors for bulk GaAs and Ge${}_{1-x}$Sn${}_x$ for a range of alloy composit…