Tunable photonic stop band in metallodielectric photonic crystals via magnetic-field-induced order-disorder transition

Michael Golosovsky; Yair Neve-Oz; Dan Davidov

doi:10.1117/12.508438

9 July 2003 Tunable photonic stop band in metallodielectric photonic crystals via magnetic-field-induced order-disorder transition

Michael Golosovsky, Yair Neve-Oz, Dan Davidov

Author Affiliations +

Proceedings Volume 5218, Complex Mediums IV: Beyond Linear Isotropic Dielectrics; (2003) https://doi.org/10.1117/12.508438
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

Citation Download Citation

Michael Golosovsky, Yair Neve-Oz, and Dan Davidov "Tunable photonic stop band in metallodielectric photonic crystals via magnetic-field-induced order-disorder transition", Proc. SPIE 5218, Complex Mediums IV: Beyond Linear Isotropic Dielectrics, (9 July 2003); https://doi.org/10.1117/12.508438

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