Tunable multiple-channel filters based on photonic heterostructures using single-negative materials |
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Authors: | XinHua Deng NianHua Liu LiPing An |
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Institution: | (1) College of Science, Nanchang University, Nanchang, 330031, China;(2) Institute for Advanced Study, Nanchang University, Nanchang, 330031, China;(3) College of Science, Yanshan University, Qinhuangdao, 066004, China |
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Abstract: | We studied the multiple-channel filters based on photonic heterostructures consisting of single-negative permittivity and
single-negative permeability media. The results showed that the number of resonance modes inside the zero-ϕeff gap increases as the number of heterogenous interface M increases. The number of resonance modes inside the zero-ϕeff gap is equal to that of heterogenous interface M, and it can be used as M channels filter. This result provides a feasible method to adjust the channel number of multiple-channel filters. When losses
are involved, the results showed that the electric fields of the resonance modes decay largely with the increase of the number
of heterogenous interface and damping factors. Besides, the relationship between the quality factor of multiple-channel filters
and the number of heterogenous interface M is linear, and the quality factor of multiple-channel filters decreases with the increase of the damping factor. These results
provide feasible methods to adjust the quality factor of multiple-channel filters.
Supported by the National Natural Science Foundation of China (Grant No. 10664002), Natural Science Foundation of Jiangxi
Province (Grant No. 2008GZW0003), Science and Technology Project of Education Department of Jiangxi Province (Grant No. GJJ09073)
and PCSIRT from China (Grant No. IRT0730) |
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Keywords: | heterostructures multiple-channel filters quality factor |
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