Abstract
An optical study of the excited states of shallow acceptors confined in narrow GaAs/As quantum wells (QW’s) is presented. The excited states have been investigated via the two-hole transitions (THT’s) of the bound exciton recombination observed in selective photoluminescence (SPL) and photoluminescence excitation (PLE) spectroscopy. Several heavy-hole (hh) -like excited nS() acceptor states dominate the satellite spectrum, but also the light-hole (lh) -like excited 2S() acceptor state has been observed in these SPL spectra. In addition, the THT corresponding to the parity-forbidden transition to the 2 excited state has been observed. When detecting any of the THT satellites corresponding to the 2S acceptor state, the 1S() hh-like acceptor ground state has been spectrally resolved from the 1S() lh-like acceptor state in PLE spectra. Together with the previously published results for the p-like excited states, these data complete the electronic structure of shallow acceptors in a QW.
- Received 11 March 1993
DOI:https://doi.org/10.1103/PhysRevB.48.8872
©1993 American Physical Society