Terahertz optical modulator based on metamaterial split-ring resonators and graphene

Degl'Innocenti, Riccardo and Jessop, David S. and Shah, Yash D. and Sibik, Juraj and Zeitler, J. Axel and Kidambi, Piran R. and Hofmann, Stephan and Beere, Harvey E. and Ritchie, David A. (2014) Terahertz optical modulator based on metamaterial split-ring resonators and graphene. Optical Engineering, 53 (5). ISSN 0091-3286

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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%.

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Journal Article
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Optical Engineering
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08 Jan 2018 15:02
Last Modified:
22 Nov 2022 05:17