LIGHT-INDUCED GRATINGS IN CDMNTESE-IN CRYSTALS

We show that DX-like centers in Cd1-xMnxTe1-ySex:In crystal can be use d in writing volume holographic gratings. The scattering efficiency is higher than 10% which proves the dispersive character of the light-in duced gratings. Two different metastable centers with different lattic e relaxation were found ill the crystal. Measurements of tile power de pendence of the degenerate four-wave mixing scattering efficiency test ify that both of these centers have negative U properties. PACS number s: 74.62.Dh, 61.72.Ji, 42.65.Hw