Low-bias terahertz amplitude modulator based on split-ring resonators and graphene

Degl'innocenti, Riccardo and Jessop, David S. and Shah, Yash D. and Sibik, Juraj and Zeitler, J. Axel and Kidambi, Piran R. and Hofmann, Stephan and Beere, Harvey E. and Ritchie, David A. (2014) Low-bias terahertz amplitude modulator based on split-ring resonators and graphene. ACS Nano, 8 (3). pp. 2548-2554. ISSN 1936-0851

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Abstract

Split-ring resonators represent the ideal route to achieve optical control of the incident light at THz frequencies. These subwavelength metamaterial elements exhibit broad resonances that can be easily tuned lithographically. We have realized a design based on the interplay between the resonances of metallic split rings and the electronic properties of monolayer graphene integrated in a single device. By varying the major carrier concentration of graphene, an active modulation of the optical intensity was achieved in the frequency range between 2.2 and 3.1 THz, achieving a maximum modulation depth of 18%, with a bias as low as 0.5 V.

Item Type:
Journal Article
Journal or Publication Title:
ACS Nano
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
89528
Deposited By:
Deposited On:
08 Jan 2018 15:10
Refereed?:
Yes
Published?:
Published
Last Modified:
20 Sep 2020 04:32