Two-dimensional Fourier spectroscopy applied to electron-phonon correlations in quantum well intersubband systems
Thi Uyen-Khanh Dang, Carsten Weber, Sebastian Eiser +2 more
Two-dimensional photon echo spectroscopy allows one to track relaxation and correlation processes in optically excited nanostructures. We analyze such spectra for intersubband transitions in an $n$-doped GaAs/Al${}_{0.35}$Ga${}_{0.65}$As single quantum well. Focusing on electron-longitudinal optical phonon interaction in a non-Markovian treatment, the carrier dynamics in the conduction subbands are investigated in the low density regime. Our results provide detailed information about the temporal evolution of electron-phonon correlations in the two-dimensional frequency spectrum.
Physical Review B•Oct 9, 2012•6 citations