Excited states of bound exciton complexes in InP

The excited terminal states of bound-exciton-donor complexes have been studied in InP by photoluminescence using a krypton-ion laser (6471 {}). A large number of optical transitions associated with the $n=2$ and $n=3$ excited donor states are observed for the first time in the magnetic field range from 12 to 40 kG. An accurate value of the binding energy of the donor (7.39 ±{} 0.01) was determined in zero magnetic field. Using this value of the binding energy and the effective mass measured by cyclotron resonance, we obtained a value of 12.21 ±{} 0.05 for the static dielectric constant. Neither adiabatic nor perturbation calculation schemes successfully describe these data, but a reasonably good fit is achieved using a phenomenological scheme developed earlier.