標題: Ordered YBCO sub-micron array structures induced by pulsed femtosecond laser irradiation
作者: Luo, C. W.
Lee, C. C.
Li, C. H.
Shih, H. C.
Chen, Y. -J.
Hsieh, C. C.
Su, C. H.
Tzeng, W. Y.
Wu, K. H.
Juang, J. Y.
Uen, T. M.
Chen, S. P.
Lin, J. -Y.
Kobayashi, T.
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
公開日期: 8-十二月-2008
摘要: We report on the formation of organized sub-micron YBa(2)Cu(3)O(7) (YBCO) dots induced by irradiating femtosecond laser pulses on YBCO films prepared by pulse laser deposition with fluence in the range of 0.21 similar to 0.53 J/cm(2). The morphology of the YBCO film surface depends strongly on the laser fluences irradiated. At lower laser fluence (similar to 0.21 J/cm(2)) the morphology was pattern of periodic ripples with sub-micrometer spacing. Slightly increasing the laser fluence to 0.26 J/cm(2) changes the pattern into organized sub-micron dots with diameters ranging from 100 nm to 800 nm and height of 150 nm. Further increase of the laser fluence to over 0.32 J/cm(2), however, appeared to result in massive melting and led to irregular morphology. The mechanism and the implications of the current findings will be discussed. Arrays of YBCO sub-micron dots with T(c) = 89.7 K were obtained. (C) 2008 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.16.020610
http://hdl.handle.net/11536/8041
ISSN: 1094-4087
DOI: 10.1364/OE.16.020610
期刊: OPTICS EXPRESS
Volume: 16
Issue: 25
起始頁: 20610
結束頁: 20616
顯示於類別:期刊論文


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