Extraction of many-body configurations from nonlinear absorption in semiconductor quantum wells.
Detailed electronic many-body configurations are extracted from quantitatively measured time-resolved nonlinear absorption spectra of resonantly excited GaAs quantum wells. The microscopic theory assigns the observed spectral changes to a unique mixture of electron-hole plasma, exciton, and polarization effects. Strong transient gain is observed only under cocircular pump-probe conditions and is attributed to the transfer of pump-induced coherences to the probe.
Smith
R P
RP
JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA.
Wahlstrand
J K
JK
Funk
A C
AC
Mirin
R P
RP
Cundiff
S T
ST
Steiner
J T
JT
Schafer
M
M
Kira
M
M
Koch
S W
SW