Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5404254 | Journal of Luminescence | 2007 | 6 Pages |
Abstract
In femtosecond degenerate four-wave mixing (FWM) spectroscopy for the exciton and biexciton system in a semiconductor β-ZnP2, we have observed that the spectrally resolved FWM signals from the exciton-biexciton transition exhibit a specific time profile consisting of a growing up and decay for negative and positive delay between two excitation pulses, respectively. The decay profile indicates unexpectedly much slower dephasing of the exciton-biexciton transition compared to 1s exciton polariton. The time profile is interpreted as the manifestation of local field renormalization due to many-body Coulomb correlation among carriers in β-ZnP2, which is made observable due to the narrow homogeneous linewidth of the exciton-biexciton transition.
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Authors
S. Nakanishi, H. Itoh, H. Miyagawa, M. Sakamoto, O. Arimoto,