28 May 2014 Terahertz optical modulator based on metamaterial split-ring resonators and graphene
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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%.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Riccardo Degl’Innocenti, Riccardo Degl’Innocenti, David S. Jessop, David S. Jessop, Yash D. Shah, Yash D. Shah, Juraj Sibik, Juraj Sibik, J. Axel Zeitler, J. Axel Zeitler, Piran R. Kidambi, Piran R. Kidambi, Stephan Hofmann, Stephan Hofmann, Harvey E. E. Beere, Harvey E. E. Beere, David A. Ritchie, David A. Ritchie, } "Terahertz optical modulator based on metamaterial split-ring resonators and graphene," Optical Engineering 53(5), 057108 (28 May 2014). https://doi.org/10.1117/1.OE.53.5.057108 . Submission:

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