非線形光学Ba_2TiSi_2O_8ナノ結晶から成る透明結晶化ガラスファイバーの化学エッチングされた先鋭化先端

概要

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Glass fibers with a diameter of 〜100μm are drawn by just pulling up melts of 40BaO・20TiO_2・40SiO_2 glass, and transparent crystallized glass fibers consisting of nonlinear optical fresnoite Ba_2TiSi_2O_8 nanocrystals (particle size: 〜100-200nm) are fabricated by crystallization of glass fibers. Precursor glass fibers and nanocrystallized glass fibers are etched chemically using a meniscus method, in which an etching solution of 0.1wt%-HF/hexane is used. Glass fibers with sharpened tips (e.g., the taper length is 〜=200μm and the tip angle is 〜θ=23°) are obtained. It is found that etched nanocrystallized glass fibers also have sharpened tips (L=50μm, θ=80°). Compared with precursor glass fibers, nanocrystallized glass fibers show a high resistance against chemical etching in a 0.1wt%HF solution. Although sharpened tips in nanocrystallized glass fibers do not have nanoscaled apertures, the present study suggests that nanocrystallized glass fibers showing second harmonic generations would have a potential for fiber-type light control optical devices.
社団法人日本セラミックス協会の論文
2007-06-01