14 February 2008 Coherent optical processes of semiconductors studied via two-dimensional Fourier transform spectroscopy
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Abstract
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 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.
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Alan D. Bristow, Alan D. Bristow, Tianhao Zhang, Tianhao Zhang, Steven T. Cundiff, Steven T. Cundiff, } "Coherent optical processes of semiconductors studied via two-dimensional Fourier transform spectroscopy", Proc. SPIE 6892, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII, 68921Q (14 February 2008); doi: 10.1117/12.764618; https://doi.org/10.1117/12.764618
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