Home > Research > Publications & Outputs > Terahertz optical modulator based on metamateri...
View graph of relations

Terahertz optical modulator based on metamaterial 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
Article number057108
<mark>Journal publication date</mark>28/05/2014
<mark>Journal</mark>Optical Engineering
Issue number5
Publication StatusPublished
<mark>Original language</mark>English


The integration of quantum cascade lasers with devices capable of efficiently manipulating terahertz light represents a fundamental step for many different applications. Split-ring resonators, subwavelength metamaterial elements exhibiting broad resonances that are easily tuned lithographically, represent the ideal route to achieve such optical control of the incident light. We have realized a design based on the interplay between metallic split rings and the electronic properties of a graphene monolayer integrated into a single device. By acting on the doping level of graphene, an active modulation of the optical intensity was achieved in the frequency range between 2.2 and 3.1 THz, with a maximum modulation depth of 18%.