Tunable diffraction of magnetic fluid films and its potential application in coarse wavelength-division multiplexing.

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.

[1]  S. L. Lee,et al.  Magnetochromatics of the magnetic fluid film under a dynamic magnetic field , 2001 .

[2]  Markus Zahn,et al.  Labyrinthine instability in magnetic and dielectric fluids , 1983 .

[3]  Shieh-Yueh Yang,et al.  Effect of temperature on the structure formation in the magnetic fluid film subjected to perpendicular magnetic fields , 2002 .

[4]  S. Taketomi,et al.  Experimental and Theoretical Investigations on Agglomeration of Magnetic Colloidal Particles in Magnetic Fluids , 1991 .

[5]  I. J. Jang,et al.  Ordered structures in Fe3O4 kerosene-based ferrofluids , 1997 .

[6]  Shieh-Yueh Yang,et al.  Origin of field-dependent optical transmission of magnetic fluid films , 2001 .

[7]  Shieh-Yueh Yang,et al.  Slab-thickness dependent band gap size of two-dimensional photonic crystals with triangular-arrayed dielectric or magnetic rods , 2003 .

[8]  J. M. Wu,et al.  Evidence of multiple states of ordered structures and a phase transition in magnetic fluid films under perpendicular magnetic fields , 1999 .

[9]  Shieh-Yueh Yang,et al.  Magnetically-modulated refractive index of magnetic fluid films , 2002 .

[10]  Hong-Chang Yang,et al.  Magnetically modulated optical transmission of magnetic fluid films , 2002 .

[11]  C. Hong,et al.  Magnetochromatic effects in magnetic fluid thin films. , 1998, Applied optics.

[12]  Control method for the tunable ordered structures in magnetic fluid microstrips , 2003 .

[13]  N. A. Yusuf.  Field and concentration dependence of chain formation in magnetic fluids , 1989 .

[14]  M. Koehl,et al.  The Interaction of Moving Water and Sessile Organisms , 1982 .

[15]  C. F. Hayes.  Observation of association in a ferromagnetic colloid , 1975 .