Three-photon absorption in direct-gap crystals.
Third-order time-dependent perturbation theory, utilizing parabolic and nonparabolic energy bands and calculated (from band structure) higher bands as intermediate levels, and a Keldysh first-order model are used to calculate three-photon-absorption coefficients of several direct-gap crystals. Third-order perturbation results for CdS at 1.06 microm agree well with the experimental data.
Mitra
S S
SS
Judell
N H
NH
Vaidyanathan
A
A
Guenther
A H
AH