7 March 2014 Graphene-based optical modulator realized in metamaterial split-ring resonators operating in the THz frequency range
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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%.
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Riccardo Degl'Innocenti, Riccardo Degl'Innocenti, David S. Jessop, David S. Jessop, Yash D. Shah, Yash D. Shah, Juraj Sibik, Juraj Sibik, Axel Zeitler, Axel Zeitler, Piran R. Kidambi, Piran R. Kidambi, Stephan Hofmann, Stephan Hofmann, Harvey E. Beere, Harvey E. Beere, David A. Ritchie, David A. Ritchie, } "Graphene-based optical modulator realized in metamaterial split-ring resonators operating in the THz frequency range", Proc. SPIE 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII, 89851E (7 March 2014); doi: 10.1117/12.2037270; https://doi.org/10.1117/12.2037270
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