Determination of the five first interband transitions above the lowest indirect band gap of the aluminum antimonide

Abstract
Electroreflectance measurements allowed us to determine the Γ8vL6c, Γ8vΓ6c, L4,5vL6c, Γ7vΓ6c, and L6vL6c AlSb transition energies from 25 to 295 K. At room temperature the Γ8vL6c and Γ8vΓ6c energies are, respectively, 2.211 and 2.300 eV; the spin-orbit splittings Γ8vΓ7v and L4,5vL6v are, respectively, 673 and 427 meV. The L4,5vL6c transition energy is 2.890 eV.