Determination of Г3 valence band in CuCl by two-photon absorption

We present the first two-photon measurements of higher band to band transitions in CuCl far beyond the well-known exciton transitions. Our measurements allow to locate the Г^v₃ valence band. This band cannot be observed in one-photon absorption in a transition to the lowest conduction band of Г^c₁ symmetry. Our assignment, which we confirm by the observed polarization dependence, should be used to reinterpret recent one-photon data.