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Proceedings Paper

Graphene-based optical modulator realized in metamaterial split-ring resonators operating in the THz frequency range
Author(s): Riccardo Degl'Innocenti; David S. Jessop; Yash D. Shah; Juraj Sibik; Axel Zeitler; Piran R. Kidambi; Stephan Hofmann; Harvey E. Beere; David A. Ritchie
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Paper 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%.

Paper Details

Date Published: 7 March 2014
PDF: 8 pages
Proc. SPIE 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII, 89851E (7 March 2014); doi: 10.1117/12.2037270
Show Author Affiliations
Riccardo Degl'Innocenti, Univ. of Cambridge (United Kingdom)
David S. Jessop, Univ. of Cambridge (United Kingdom)
Yash D. Shah, Univ. of Cambridge (United Kingdom)
Juraj Sibik, Univ. of Cambridge (United Kingdom)
Axel Zeitler, Univ. of Cambridge (United Kingdom)
Piran R. Kidambi, Univ. of Cambridge (United Kingdom)
Stephan Hofmann, Univ. of Cambridge (United Kingdom)
Harvey E. Beere, Univ. of Cambridge (United Kingdom)
David A. Ritchie, Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 8985:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII
Laurence P. Sadwick; Créidhe M. O'Sullivan, Editor(s)

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