Coherent optical processes of semiconductors studied via two-dimensional Fourier transform spectroscopy

Alan D. Bristow, Tianhao Zhang, Steven T. Cundiff, Jin-Joo Song, Kong-Thon Tsen, Markus Betz, Abdulhakem Y. Elezzabi
2008 Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII  
Two-dimensional Fourier transform spectroscopy, an extension of four-wave mixing (FWM), is able to resolve numerous aspects of many-body effects and higher-order Coulomb interactions that contribute to the ultrafast dynamics of quantum wells and bulk GaAs resonances. Coherent oscillations between heavy-hole and light-hole excitons -or quantum beats -can be unfolded from the exciton populations by Fourier transforming FWM data with respect to two time-axes. Excitation conditions such as pulse
more » ... ns such as pulse ordering, polarization, tuning and pulse energy can isolate Feynman pathways and highlight the coherent many-body correlations, including those from biexcitons. In addition, the bulk exciton and continuum states are studied more carefully for their dynamics.
doi:10.1117/12.764618 fatcat:xpy6retddneyho7hxdxzy5zhbu