Optimizing broadband terahertz modulation with hybrid graphene/metasurface structures.
basic_science · Level V
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- Record sourced from PubMed, PMID 25483819.
- Also identified by DOI 10.1021/nl503670d.
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Abstract
We demonstrate efficient terahertz (THz) modulation by coupling graphene strongly with a broadband THz metasurface device. This THz metasurface, made of periodic gold slit arrays, shows near unity broadband transmission, which arises from coherent radiation of the enhanced local-field in the slits. Utilizing graphene as an active load with tunable conductivity, we can significantly modify the local-field enhancement and strongly modulate the THz wave transmission. This hybrid device also provides a new platform for future nonlinear THz spectroscopy study of graphene.