Abstract
Small-sized semiconductor-doped glasses have recently become one of the interesting topics in glass scientists because they have potential applications in nonlinear optics. This chapter deals with the preparation and nonlinear optical properties of the small-sized semiconductor-doped glasses by the sol-gel process. Sol-gel process can produce glasses doped with many different semiconductors at moderately low temperature, that are not possible with conventional melting method. Microcrystalline CdS, ZnS, PbS, CdSe, CdTe, CuCI and CuBr with the crystal size ranging 2 to 10 nm in diameter were dopd in the glasses by the sol-gel process. Optical absorption edge associated with those crystals exhibited large blue shift compared to that of bulk crystal and the energy shift, was reciprocally proportional to the square of the crystal size. χ3 was estimated to be 1.5 x 10.-10 esu for CdS-doped glass and 1.1 x 10-8 esu for CuCI-doped glass, respectively.
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