Ordered YBCO sub-micron array structures induced by pulsed femtosecond laser irradiation

Chih-Wei Luo, C. C. Lee, C. H. Li, H. C. Shin, Y. J. Chen, C. C. Hsieh, C. H. Su, W. Y. Tzeng, Kaung-Hsiung Wu, Jenh-Yih Juang, T. M. Uen, S. P. Chen, Jiunn-Yuan Lin, T. Kobayashi

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

We report on the formation of organized sub-micron YBa2Cu 3O7 (YBCO) dots induced by irradiating femtosecond laser pulses on YBCO films prepared by pulse laser deposition with fluence in the range of 0.21∼0.53 J/cm2. The morphology of the YBCO film surface depends strongly on the laser fluences irradiated. At lower laser fluence (∼0.21 J/cm2) 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/cm2, 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 Tc = 89.7 K were obtained.

原文English
頁(從 - 到)20610-20616
頁數7
期刊Optics Express
16
發行號25
DOIs
出版狀態Published - 8 12月 2008

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