Mechanically tunable terahertz metamaterials

Electromagnetic device design and flexible electronics fabrication are combined to demonstrate mechanically tunable metamaterials operating at terahertz frequencies. Each metamaterial comprises a planar array of resonators on a highly elastic polydimethylsiloxane substrate. The resonance of the meta...

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Bibliographic Details
Published in:Applied physics letters 2013-03, Vol.102 (12)
Main Authors: Li, Jining, Shah, Charan M., Withayachumnankul, Withawat, Ung, Benjamin S.-Y., Mitchell, Arnan, Sriram, Sharath, Bhaskaran, Madhu, Chang, Shengjiang, Abbott, Derek
Format: Article
Language:English
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Summary:Electromagnetic device design and flexible electronics fabrication are combined to demonstrate mechanically tunable metamaterials operating at terahertz frequencies. Each metamaterial comprises a planar array of resonators on a highly elastic polydimethylsiloxane substrate. The resonance of the metamaterials is controllable through substrate deformation. Applying a stretching force to the substrate changes the inter-cell capacitance and hence the resonance frequency of the resonators. In the experiment, greater than 8% of the tuning range is achieved with good repeatability over several stretching-relaxing cycles. This study promises applications in remote strain sensing and other controllable metamaterial-based devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4773238