When an external magnetic field is applied parallel to the film surface of a magnetic fluid film, a high-quality one-dimensional periodic chain structure is formed when the field strength reaches a certain level. With a periodic chain structure in the magnetic fluid film, an incident light is diffracted onto the magnetic thin film. The results show that the one-dimensional periodic chain structure in the magnetic fluid film can serve as an optical grating. Further investigations reveal the feasibility of developing tunable coarse wavelength-division multiplexing by utilizing a periodic chain structure.
© 2004 Optical Society of America
Yen-Wen Huang, Ssu-Tse Hu, Shieh-Yueh Yang, Herng-Er Horng, Jung-Chun Hung, Chin-Yih Hong, Hong-Chang Yang, Cha-Hsin Chao, and Ching-Fuh Lin, "Tunable diffraction of magnetic fluid films and its potential application in coarse wavelength-division multiplexing," Opt. Lett. 29, 1867-1869 (2004)