Excitonic photoluminescence in semiconductor quantum wells: plasma versus excitons.
Time-resolved photoluminescence spectra after nonresonant excitation show a distinct 1s resonance, independent of the existence of bound excitons. A microscopic analysis identifies exciton and electron-hole plasma contributions. For low temperatures and low densities, the excitonic emission is extremely sensitive to details of the electron-hole-pair population making it possible to identify even minute fractions of optically active excitons.
Chatterjee
S
S
Optical Sciences Center, The University of Arizona, Tucson, Arizona 85721-0094, USA.
Ell
C
C
Mosor
S
S
Khitrova
G
G
Gibbs
H M
HM
Hoyer
W
W
Kira
M
M
Koch
S W
SW
Prineas
J P
JP
Stolz
H
H