Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | 057108 |
---|---|
<mark>Journal publication date</mark> | 28/05/2014 |
<mark>Journal</mark> | Optical Engineering |
Issue number | 5 |
Volume | 53 |
Publication Status | Published |
<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%.