Degl'Innocenti, Riccardo and Jessop, David S. and Shah, Yash D. and Sibik, Juraj and Zeitler, Axel and Kidambi, Piran R. and Hofmann, Stephan and Beere, Harvey E. and Ritchie, David A. (2014) Graphene-based optical modulator realized in metamaterial split-ring resonators operating in the THz frequency range. Proceedings of SPIE, 8985. ISSN 0277-786X
Full text not available from this repository.Abstract
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%.