TY - JOUR
T1 - Radiative properties of multicarrier bound excitons in GaAs
AU - Karin, Todd
AU - Barbour, Russell J.
AU - Santori, Charles
AU - Yamamoto, Yoshihisa
AU - Hirayama, Yoshiro
AU - Fu, Kai Mei C.
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/4/20
Y1 - 2015/4/20
N2 - Excitons in semiconductors can have multiple lifetimes due to spin-dependent oscillator strengths and interference between different recombination pathways. In addition, strain and symmetry effects can further modify lifetimes via the removal of degeneracies. We present a convenient formalism for predicting the optical properties of k=0 excitons with an arbitrary number of charge carriers in different symmetry environments. Using this formalism, we predict three distinct lifetimes for the neutral acceptor bound exciton in GaAs, and confirm this prediction through polarization dependent and time-resolved photoluminescence experiments. We find the acceptor bound-exciton lifetimes to be To×(1,3,34), where To=(0.61±0.12)ns. Furthermore, we provide an estimate of the intralevel and interlevel exciton spin-relaxation rates.
AB - Excitons in semiconductors can have multiple lifetimes due to spin-dependent oscillator strengths and interference between different recombination pathways. In addition, strain and symmetry effects can further modify lifetimes via the removal of degeneracies. We present a convenient formalism for predicting the optical properties of k=0 excitons with an arbitrary number of charge carriers in different symmetry environments. Using this formalism, we predict three distinct lifetimes for the neutral acceptor bound exciton in GaAs, and confirm this prediction through polarization dependent and time-resolved photoluminescence experiments. We find the acceptor bound-exciton lifetimes to be To×(1,3,34), where To=(0.61±0.12)ns. Furthermore, we provide an estimate of the intralevel and interlevel exciton spin-relaxation rates.
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U2 - 10.1103/PhysRevB.91.165204
DO - 10.1103/PhysRevB.91.165204
M3 - Article
AN - SCOPUS:84929192667
SN - 1098-0121
VL - 91
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 16
M1 - 165204
ER -