Journal
JOURNAL OF APPLIED PHYSICS
Volume 115, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4883962
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Funding
- National Natural Science Foundation of China [61302023, 11274389, 11204378]
- Natural Science Foundation of Shaanxi Province, China [2011JQ8031]
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In this paper, we propose and fabricate multiband all-dielectric left-handed metamaterials (ADMs) in the X-band microwave regime. The ADMs are fabricated by a combination of dielectric resonators in shapes of cubes and rods. The ADMs can exhibit two left-handed pass bands while the rods contact the sidewalls of the waveguide. A band split phenomenon is observed when the boundary conditions of dielectric rods change. The two pass bands can diverge into three left-handed pass bands when the rods do not contact the waveguide. By using field analysis and dielectric resonator theory, we prove that the boundary conditions have a strong influence on the resonant modes of the rod resonator, which plays key roles in left-handedness. The boundary tuned resonant modes can broaden our ways of designing new types of metamaterials. (C) 2014 AIP Publishing LLC.
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