Formation of photonic structures in Sm²⁺-doped aluminosilicate glasses through phase separation

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• 作者：Koji Fujita ; Shunsuke Murai ; Kazuki Nakanishi and Kazuyuki Hirao
• 关键词：Luminescence ; Aluminosilicates ; Rare-earths in glasses ; Sol– ; gel ; aerogel and solution chemistry
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2006
• 出版时间：15 July 2006
• 年：2006
• 卷：352
• 期：23-25
• 页码：2496-2500
• 全文大小：366 K

文摘

Sm²⁺-doped Al₂O₃–SiO₂ glasses with three-dimensionally interconnected macroporous morphology have been prepared via the alkoxide-derived sol–gel process containing poly(ethylene oxide) and SmCl₃ · 6H₂O. The macroporous morphology is obtained by concurrently inducing the phase separation and sol–gel transition. When the macroporous aluminosilicate glasses doped with Sm²⁺ are irradiated with a visible light laser at the wavelength of 488 nm, a hole or a dip appears in the plot of fluorescence intensity versus the incident angle of laser beam, indicating that the valence state of Sm²⁺ is spatially modulated through the interference of multiply scattered light. The hole profile can be controlled by adjusting the macroporous morphology.