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Proceedings Paper

Tunable photonic stop band in metallodielectric photonic crystals via magnetic-field-induced order-disorder transition
Author(s): Michael Golosovsky; Yair Neve-Oz; Dan Davidov
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Paper Abstract

We fabricated a photonic bandgap material consisting of a stack of containers with steel spheres. In the absence of external magnetic field the particles are in a disordered state. Magnetic field magnetizes the particles and they self-assemble into ordered crystalline state. We study mm-wave transmission through the stack as a function of magnetic field, i.e. for different degrees of order. This system exhibits a well-defined stopband in the ordered state, while in the disordered state the stopband becomes completely smeared. We model our results using the effective-medium approximation. We relate the disappearance of the stopband in the disordered state to the fluctuations in refraction index and admittance of individual layers. These fluctuations arise from the in-plane density fluctuations. Magnetic field suppresses density fluctuations and thus controls electromagnetic wave propagation through teh stack.

Paper Details

Date Published: 9 July 2003
PDF: 8 pages
Proc. SPIE 5218, Complex Mediums IV: Beyond Linear Isotropic Dielectrics, (9 July 2003); doi: 10.1117/12.508438
Show Author Affiliations
Michael Golosovsky, The Hebrew Univ. of Jerusalem (Israel)
Yair Neve-Oz, The Hebrew Univ. of Jerusalem (Israel)
Dan Davidov, The Hebrew Univ. of Jerusalem (Israel)

Published in SPIE Proceedings Vol. 5218:
Complex Mediums IV: Beyond Linear Isotropic Dielectrics
Martin W. McCall; Graeme Dewar, Editor(s)

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