Abstract
AbstractWe studied photoinduced Kerr effect in cavity polaritons in a semiconductor microcavity by carefully measuring the time‐resolved Kerr rotation and ellipticity spectra. The Kerr rotation angle of the microcavity polaritons is a hundred times larger than a conventional single quantum well. A spectral shape analysis of the observed spectra suggests that the photoindeced Kerr effect mainly results from a line broadening of the polarions due to spin‐polarized polariton‐polariton scattering. Enhancement in oscillator strength also contributes to the large rotation angle. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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