金コロイドドープガラスのゾル-ゲル法による調製と光学非線形性

概要

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Au microcrystal-doped glass films with high optical nonlinearity were prepared by the sol-gel method with dip-coating using NaAuCl_4・2H_2O and tetraethyl orthosilicate (TEOS) as starting materials. The glass film with an Au/Si atomic ratio of 0.01 was successfully prepared. The nonlinear susceptibility x^<(3)> of the film was 7.7×l0^<-9> esu. Microcrystals with a radius of about 7Å and of about 30Å coexisted in the glass film. The nonlinear susceptibility of Au microcrystals itself in the film, Xm^<(3)>, was 1.0×10^<-7> esu and was two times larger than that observed in Au-doped glasses prepared by the melting method. Subsequent heat treatment of the films at 1000℃ changed the absorption spectra and decreased x^<(3)> by a factor of two. The atomic ratio of Au/Si was able to be increased to 0.04.
社団法人日本セラミックス協会の論文
1993-01-01