Tunable multiband and broadband terahertz absorber based on cascaded graphene nanoribbon array

Jun Wu

doi:10.1117/1.JNP.13.016010

9 March 2019 Tunable multiband and broadband terahertz absorber based on cascaded graphene nanoribbon array

Jun Wu

Author Affiliations +

Journal of Nanophotonics, Vol. 13, Issue 1, 016010 (March 2019). https://doi.org/10.1117/1.JNP.13.016010

Abstract

The tunable absorption effects with cascaded graphene nanoribbon arrays are investigated. It is achieved by cascading two pairs of graphene nanoribbon arrays-dielectric spacers on a metallic mirror. It is found that dual-band and a broadband absorbers can be easily achieved by tuning the geometry parameters of the structure. The designed dual-band graphene absorber exhibits near-unity absorption at two resonant frequencies and the broadband absorber shows high absorption over a wide frequencies range. Moreover, the absorption performance can not only be tuned in wide frequency ranges by changing the Fermi level, but also be maintained over a large incident angle range. It is believed that the concepts can be expanded to design multiband and more broadband absorbers by cascading many pairs of graphene nanoribbon arrays-dielectric spacers.

Citation Download Citation

Jun Wu "Tunable multiband and broadband terahertz absorber based on cascaded graphene nanoribbon array," Journal of Nanophotonics 13(1), 016010 (9 March 2019). https://doi.org/10.1117/1.JNP.13.016010

Received: 30 October 2018; Accepted: 25 February 2019; Published: 9 March 2019

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