Tuning the hybridization bandgap by meta-molecules with in-unit interaction

In this paper, we demonstrate that the hybridization bandgap (HBG) can be tuned conveniently by deep subwavelength meta-molecules with in-unit interaction. Spontaneous-emission-cancellation-like (SEC-like) effect is realized in a meta-molecule by introducing the destructive interference of two detun...

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Bibliographic Details
Published in:Journal of applied physics 2015-09, Vol.118 (9)
Main Authors: Chen, Yongqiang, Li, Yunhui, Wu, Qian, Jiang, Haitao, Zhang, Yewen, Chen, Hong
Format: Article
Language:English
Subjects:
Applied physics
ATOMS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Computer simulation
COMPUTERIZED SIMULATION
Energy gap
HYBRIDIZATION
INTERACTIONS
INTERFERENCE
METAMATERIALS
MICROWAVE RADIATION
MOLECULES
RESONATORS
SPECTRA
TUNING
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Summary:In this paper, we demonstrate that the hybridization bandgap (HBG) can be tuned conveniently by deep subwavelength meta-molecules with in-unit interaction. Spontaneous-emission-cancellation-like (SEC-like) effect is realized in a meta-molecule by introducing the destructive interference of two detuned meta-atoms. The meta-atoms consisting of subwavelength zero-index-metamaterial-based resonators are side-coupled to a microstrip. Compared to conventional HBG configurations, the presence of in-unit interaction between meta-atoms provides more flexibility in tuning the bandgap properties, keeping the device volume almost unchanged. Both numerical simulations and microwave experiments confirm that the width, depth, and spectrum shape of HBG can be tuned by simply introducing SEC-like interaction into the meta-molecule. Due to these features, our design may be promising to be applied in microwave or optics communications systems with strict limitation of device volume and flexible bandgap properties.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4930038