Friday, February 12, 2016

Abstract-Exceptional Terahertz Wave Modulation in Graphene Enhanced by Frequency Selective Surfaces

ACS Photonics, Just Accepted Manuscript
DOI: 10.1021/acsphotonics.5b00639
Publication Date (Web): February 11, 2016
Copyright © 2016 American Chemical Society

In this paper we theoretically and experimentally analyze the design tradeoffs in terahertz metamaterial modulators consisting of hybrid graphene/metal stacked structures. In these devices graphene is used as the active medium whereas a passive metallic frequency selective surface is employed to enhance the light-matter interaction in graphene. When altering the structure key geometrical parameters, we observe a close match between our experiments and theory, showing that it is possible to achieve an optimal tradeoff between modulation depth, insertion loss, and speed in these devices. Moreover, a transmission line based compact mathematical model is introduced in order to explain our experimental observations and predict the performance limits in these structures.

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