Orientation-controllable self-organized microgratings induced in the bulk SrTiO3 crystal by a single femtosecond laser beam

Department of Material Science and Engineering, Zhejiang University, Hang-hsien, Zhejiang Sheng, China
Optics Express (Impact Factor: 3.49). 11/2007; 15(22):14524-9. DOI: 10.1364/OE.15.014524
Source: PubMed


Self-organized microgratings were induced in the bulk SrTiO(3) crystal by readily scanning the laser focus in the direction perpendicular to the laser propagation axis. The groove orientations of those gratings could be controlled by changing the irradiation pulse number per unit scanning length, which could be implemented either through adjusting the scanning velocity at a fixed pulse repetition rate or through varying the pulse repetition rate at a fixed scanning velocity. This high-speed method for fabrication of microgratings will have many potential applications in the integration of micro-optical elements. The possible formation mechanism of the self-organized microgratings is also discussed.

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