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Band gaps from ring resonators and structural periodicity

Authors Qi, YB
Hou, B. HKUST affiliated (currently or previously)
Wen, WJ View this author's profile
Issue Date 2005
Source Journal OF PHYSICS d-applied PHYSICS , v. 38, (4), 2005, FEB 21, p. 590-595
Summary The electromagnetic band gap properties through a two-dimensional plate constructed with centimetre-sized spherical foam balls surrounded by aluminium rings are studied in the microwave range of 0.7-18 GHz. We observe from both experiments and finite-difference time-domain simulations that multiple band gaps appear and correspond to different resonant modes localized in the rings. The principal stop band, the lowest mode, appears at low frequencies and is robust to any lattice structure, even disorder. However, the remaining auxiliary stop bands, caused by high-order resonances, are usually located at higher frequencies and are more sensitive to the configuration of the structure formed by the ring resonators. We note that the stop bands would be broadened and strongly attenuated if more layers of the same plates were packed together. In addition, even or odd modes can be excited under different orientations of the rings with respect to the polarization of the illuminating radiation.
ISSN 0022-3727
Rights J. Phys. D: Appl. Phys. © copyright (2005) IOP Publishing Ltd. The Journal's web site is located at
Language English
Format Article
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