Two-color pulse-shaping technique is used to probe the relative phase between exciton and free carrier polarizations in four-wave mixing. It appears that the virtual excitation of excitons at free carrier energies is an important contribution.
© 2004 Optical Society of America
(190.0190) Nonlinear optics : Nonlinear optics
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(320.0320) Ultrafast optics : Ultrafast optics
(320.7120) Ultrafast optics : Ultrafast phenomena
Y. Ahn, H. Ghim, D. Park, and D. Kim, "Phase shift between exciton and free carrier polarization in semiconductor quantum wells," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2004), paper IMB2.
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