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Experimental investigations on magnetically induced photonic band gap in ferrodispersions

Published online by Cambridge University Press:  30 November 2010

R. Patel  and
R. V. Mehta
R. Patel
Affiliation:
Department of Physics, Bhavnagar University, Bhavnagar 364022, GJ, India
R. V. Mehta*
Affiliation:
Department of Physics, Bhavnagar University, Bhavnagar 364022, GJ, India
*
rvm@bhavuni.edu
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Abstract

We show here that at a certain externally applied static magnetic field of moderate value, photonic band gap (PBG) is induced at optical frequencies in a stable colloidal dispersion containing a mixture of micron and nano sized magnetite spheres. The PBG is found to depend on the size of microspheres and is observed for only TM mode of the incident waves. Effect of nonmagnetic doping on the PBG is also discussed. The observed effects are attributed to the magnetically induced morphological dependent resonance (MDR) in the micron sized magnetic spheres. The technique to induce PBG may be easily amenable for lab-on-chip devices.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 52 , Issue 3 , December 2010 , 30702
Copyright
© EDP Sciences, 2010

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