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Graphene-based optical modulator realized in metamaterial split-ring resonators operating in the THz frequency range

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • Riccardo Degl'Innocenti
  • David S. Jessop
  • Yash D. Shah
  • Juraj Sibik
  • Axel Zeitler
  • Piran R. Kidambi
  • Stephan Hofmann
  • Harvey E. Beere
  • David A. Ritchie
Article number89851E
<mark>Journal publication date</mark>7/03/2014
<mark>Journal</mark>Proceedings of SPIE
Publication StatusPublished
<mark>Original language</mark>English
EventTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII - San Francisco, CA, United States
Duration: 4/02/20146/02/2014


ConferenceTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII
Country/TerritoryUnited States
CitySan Francisco, CA


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, sub-wavelength 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 THz and 3.1 THz, with a maximum modulation depth of 18%.