Suppressing the thermal lens effect by magnetic-field-induced mass transfer and phase separation in a magnetic fluid

Shengli Pu; Xianfeng Chen; Lijun Chen; Weijun Liao; Yuping Chen; Yuxing Xia
July 2005
Applied Physics Letters;7/11/2005, Vol. 87 Issue 2, p021905
Academic Journal
A method for suppressing the thermal lens effect in a magnetic fluid is proposed in this letter. When an external parallel magnetic field is applied, the thermal lens effect is weakened, and the degree of the divergence of the laser beam after passing through the magnetic fluid decreases. By experimental measurement and theoretical analysis, we assign this phenomenon to two physical mechanisms: the magnetic-field-induced mass transfer and phase separation in the magnetic fluid. With this method, the quality of the magnetic-fluid-based potential photonic devices can be improved.


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