Two-quantum many-body coherences in two-dimensional fourier-transform spectra of exciton resonances in semiconductor quantum wells.
We present experimental coherent two-dimensional Fourier-transform spectra of Wannier exciton resonances in semiconductor quantum wells generated by a pulse sequence that isolates two-quantum coherences. By measuring the real part of the signals, we determine that the spectra are dominated by two-quantum coherences due to mean-field many-body interactions, rather than bound biexcitons. Simulations performed using dynamics controlled truncation agree with the experiments.
Karaiskaj
Denis
D
JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA.
Bristow
Alan D
AD
Yang
Lijun
L
Dai
Xingcan
X
Mirin
Richard P
RP
Mukamel
Shaul
S
Cundiff
Steven T
ST