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Silver photo-diffusion and photo-induced macroscopic surface deformation of Ge$$_{33}$$S$$_{67}$$/Ag/Si substrate

Ge$$_{33}$$S$$_{67}$$/Ag/Siにおける銀の光拡散と表面変形

坂口 佳史*; 朝岡 秀人; 魚住 雄輝; 近藤 啓悦; 山崎 大; 曽山 和彦; Ailavajhala, M.*; Mitkova, M.*

Sakaguchi, Yoshifumi*; Asaoka, Hidehito; Uozumi, Yuki; Kondo, Keietsu; Yamazaki, Dai; Soyama, Kazuhiko; Ailavajhala, M.*; Mitkova, M.*

Ge-chalcogenide films show various photo-induced changes, and silver photo-diffusion is one of them which attracts lots of interest. In this paper, we report how silver and Ge-chalcogenide layers in Ge$$_{33}$$S$$_{67}$$/Ag/Si substrate stacks change under light exposure in the depth by measuring time-resolved neutron reflectivity. It was found from the measurement that Ag ions diffuse all over the matrix Ge$$_{33}$$S$$_{67}$$ layer once Ag dissolves into the layer. We also found that the surface was macro-scopically deformed by the extended light exposure. Its structural origin was investigated by a scanning electron microscopy.

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パーセンタイル:57.78

分野:Physics, Applied

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