کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1483561 | 1510503 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electric field induced structural modification and second order optical nonlinearity in potassium niobium silicate glass
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electric field induced structural modification and second order optical nonlinearity in potassium niobium silicate glass Electric field induced structural modification and second order optical nonlinearity in potassium niobium silicate glass](/preview/png/1483561.png)
چکیده انگلیسی
Second harmonic generation properties have been studied in 23 K2O · 27Nb2O5 · 50 SiO2 glass subjected to thermal poling. The poling-induced optical nonlinearity, with Ï(2) = 3.8 pm/V, has been related to structural modifications within a surface layer of a few microns on the anode side, as evidenced by means of confocal micro-Raman mapping along the sample thickness. The data indicate that the structural changes result from a charge transport process that causes network modifications in an alkali depleted layer whose thickness is comparable with that of the non-linear region. The Raman data also indicate that in the alkali depleted layer the network polymerization degree increases as a consequence of ion migration. The origin of the nonlinearity and the mechanisms activated by poling are discussed. The mechanism of non-bridging-oxygen to bridging-oxygen bond switching is proposed to explain ion migration and the subsequent structural changes in the glass.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 355, Issues 52â54, 15 December 2009, Pages 2578-2582
Journal: Journal of Non-Crystalline Solids - Volume 355, Issues 52â54, 15 December 2009, Pages 2578-2582
نویسندگان
P. Pernice, A. Paleari, M. Ferraris, M. Fokine, E. Fanelli, R. Lorenzi, G. Spinolo, A. Aronne,