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.
CITATION STYLE
Shi, S. F., Zeng, B., Han, H. L., Hong, X., Tsai, H. Z., Jung, H. S., … Wang, F. (2015). Optimizing broadband terahertz modulation with hybrid graphene/metasurface structures. Nano Letters, 15(1), 372–377. https://doi.org/10.1021/nl503670d
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