Home > Research > Publications & Outputs > Low-bias terahertz amplitude modulator based on...


Text available via DOI:

View graph of relations

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

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • Riccardo Degl'innocenti
  • David S. Jessop
  • Yash D. Shah
  • Juraj Sibik
  • J. Axel Zeitler
  • Piran R. Kidambi
  • Stephan Hofmann
  • Harvey E. Beere
  • David A. Ritchie
<mark>Journal publication date</mark>25/03/2014
<mark>Journal</mark>ACS Nano
Issue number3
Number of pages7
Pages (from-to)2548-2554
Publication StatusPublished
Early online date13/02/14
<mark>Original language</mark>English


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.