Time response of one-dimensional photonic crystals with a defect layer made of semiconductor quantum dots

The effective optical nanlinearity of semiconductor quantum dots can be enh anced in one-dimensional photonic crystal structures. We have fabricated a one-dimensional photonic crystal with a structural defect which is made of CdSe quantum dots. Besides the enhancement of degenerate four-wave mixing e fficiency, a fast response of transient population grating in an order of a picosecond was obtained in the one-dimensional photonic crystal. This stru cture can be used as a future photonic device with high nonlinearity and fa st response.