| Issue |
EPL
Volume 89, Number 6, March 2010
|
|
|---|---|---|
| Article Number | 64003 | |
| Number of page(s) | 4 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/89/64003 | |
| Published online | 07 April 2010 | |
Experimental demonstration of tunable gyromagnetic photonic crystals controlled by dc magnetic fields
Laboratory of Optical Physics, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science - P.O. Box 603, Beijing 100190, China
Corresponding author: lizy@aphy.iphy.ac.cn
Received:
1
February
2010
Accepted:
4
March
2010
We build a two-dimensional square-lattice gyromagnetic photonic crystal from magneto-optical material of yttrium-iron-garnet (YIG) and demonstrate its tunable electromagnetic properties by placing the photonic crystal in a tunable dc magnetic field and measuring the transmission spectra for microwaves. The magnetic field breaks the intrinsic degeneracy at the M symmetry point between the 2-3 photonic bands and opens a band gap. Near the resonance frequency of YIG, a band gap is also opened due to the metallic properties of YIG. Our work opens a window to exploit magneto-optical photonic crystals as tunable integrated optical devices.
PACS: 42.70.Qs – Photonic bandgap materials / 78.20.Ls – Magneto-optical effects
© EPLA, 2010
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