Photonic-crystal resonant effect using self-assembly ordered structures in magnetic fluid films under external magnetic fields

Shieh-Yueh Yang, Herng-Er Horng, Y. T. Shiao, Chin Yih Hong, Hong-Chang Yang

研究成果: 雜誌貢獻文章

17 引文 斯高帕斯(Scopus)

摘要

When an external magnetic field is applied perpendicularly to a magnetic fluid film, a self-assembly hexagonal ordered structure is formed in the film when the field exceeds a certain strength. The period of the ordered structure can be manipulated from several micrometers down to sub-micrometers by increasing the field strength or reducing the film thickness. By injecting a light propagating along the in-plane direction of the film, photonic-crystal band gaps can be observed. With the tunability of the ordered structure, the forbidden photonic bands can be adjusted by varying the external field strength. It was further found that resonant modes are generated when a point defect is artificially implanted into the self-assembly ordered structure in the magnetic fluid film. These results reveal that the self-assembly ordered structure in a magnetic fluid film under external magnetic fields acts as a photonic crystal.

原文英語
頁(從 - 到)43-47
頁數5
期刊Journal of Magnetism and Magnetic Materials
307
發行號1
DOIs
出版狀態已發佈 - 2006 十二月 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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