Tunable magnetic fluid grating by applying a magnetic field

Shengli Pu; Xianfeng Chen; Lijun Chen; Weijun Liao; Yuping Chen; Yuxing Xia
July 2005
Applied Physics Letters;7/11/2005, Vol. 87 Issue 2, p021901
Academic Journal
A kind of tunable magnetic fluid grating is developed in this letter. The operating principle of the tunable magnetic fluid grating is analyzed theoretically. When the absorption coefficient modulation of the grating is not too large, the energy of the zeroth-order diffracted light can be transferred to that of the higher-order completely and vice versa. Experiments are done to investigate the tunable diffraction properties of the magnetic fluid grating, and the transfer of the energy of the zeroth-order diffracted light to that of the higher-order is apparent.


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