Haro-González P, Martín I R, Creus Alberto Hernández
Dep. de Física Fundamental, Electrónica y Sistemas, Universidad de La Laguna, Tenerife, Spain.
Opt Express. 2010 Jan 18;18(2):582-90. doi: 10.1364/OE.18.000582.
Localized modification in strontium barium niobate glass doped with Ho(3+) under laser irradiation has been carried out. The preliminary samples of this study have been fabricated by the melt quenching method and doped with 2.5% mol of Ho(3+). A 3.5W cw multiline Ar-laser has been focused and shifted in a line during laser irradiation. The formation of Strontium Barium Niobate nanocrystals has been confirmed by X-ray diffraction, atomic force microscope image and fluorescence. They have been localized in the irradiation line and change the optical properties of the sample. These nanocrystals have been obtained due to the excitation of the Ho(3+) ions which under nonradiative processes produced the heating of the sample. In this work, it has been demonstrated that the diffusion of the Nb(5+) ions to the border of the irradiated line controls the growth of the nanocrystals in the sample.
已对掺 Ho(3+) 的铌酸锶钡玻璃在激光辐照下进行了局部改性。本研究的初步样品采用熔体淬火法制备，并掺杂了 2.5% 摩尔的 Ho(3+)。一台 3.5W 连续波多线氩激光器在激光辐照期间被聚焦并沿一条线移动。通过 X 射线衍射、原子力显微镜图像和荧光证实了铌酸锶钡纳米晶体的形成。它们已定位在辐照线上并改变了样品的光学性质。这些纳米晶体是由于 Ho(3+) 离子的激发而获得的，在非辐射过程中 Ho(3+) 离子使样品发热。在这项工作中，已证明 Nb(5+) 离子向辐照线边界的扩散控制了样品中纳米晶体的生长。
