Electromagnetically induced transparency and slow light in a simple complementary metamaterial constructed by two bright slot-structures
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Abstract
We numerically demonstrate a plasmonic analogue of electromagnetically induced transparency in a simple complementary metamaterial, the unit cell of which consists of two bright slot-structures in a homogenous gold film deposited on a glass substrate. A pronounced transparency peak within a broad reflectance resonance spectrum is activated through the coupling in the asymmetric elements when the symmetry of two slot-structures is broken. Moreover, the strength and width of the reflectance transparency peak can be tuned by controlling the asymmetric degree or spacing of two slot-structures. In addition, the presence of the reflectance transparency window is also accompanied by slow-light effect, where its group velocity is reduced by a factor of over 100. Therefore, this complementary metamaterial could have the potential applications in slow-light and filtering devices.
Keywords
Reflectance Peak Electromagnetically Induce Transparency Group Index Transparency Window Dark ModeNotes
Acknowledgments
The work is supported by the National Natural Science Foundation of China (51005001), the Postdoctoral Science-Research Developmental Foundation of Heilongjiang Province (LBH-Q11082), the Youth Academic Backbone Support Plan of Heilongjiang Province Ordinary College (2013) and Science Funds for the Young Innovative Talents of HUST (2011).
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