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Ultra-deep stopband induced by spontaneous-emission-cancellation-like interference between two side-coupled zero-index-metamaterial-based resonators

In this paper, two side-coupled zero-index-metamaterial-based resonators that mimic the spontaneous-emission cancellation (SEC) effect are investigated numerically and experimentally. It is found that an interference-induced stopband as deep as −70 dB can be observed in a microstrip SEC structure wh...

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Bibliographic Details
Published in:Europhysics letters 2012-11, Vol.100 (3), p.34003
Main Authors: Li, Y. H., Dong, Z. D., Sun, Y., Tan, W., Jiang, H. T., Wang, Z G., Chen, H.
Format: Article
Language:English
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Summary:In this paper, two side-coupled zero-index-metamaterial-based resonators that mimic the spontaneous-emission cancellation (SEC) effect are investigated numerically and experimentally. It is found that an interference-induced stopband as deep as −70 dB can be observed in a microstrip SEC structure whose size is even less than 0.5 cm2. More simulations about the electrical-field distributions demonstrate intuitively the underlying physics, i.e., the destructive interference between two side-coupled zero-index-metamaterial-based resonators. Our method of realizing ultra-deep stopband properties in a miniaturized filter may find potential applications in both microwave and optical-communication systems.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/100/34003