Low-bias terahertz amplitude modulator based on split-ring resonators and graphene

Degl’Innocenti, R., Jessop, D. S., Shah, Y. D. , Sibik, J., Zeitler, J. A., Kidambi, P. R., Hofmann, S., Beere, H. E. and Ritchie, D. A. (2014) Low-bias terahertz amplitude modulator based on split-ring resonators and graphene. ACS Nano, 8(3), pp. 2548-2554. (doi:10.1021/nn406136c) (PMID:24558983)

Full text not currently available from Enlighten.

Abstract

Split-ring resonators represent the ideal route to achieve optical control of the incident light at THz frequencies. These subwavelength metamaterial elements exhibit broad resonances that can be easily tuned lithographically. We have realized a design based on the interplay between the resonances of metallic split rings and the electronic properties of monolayer graphene integrated in a single device. By varying the major carrier concentration of graphene, an active modulation of the optical intensity was achieved in the frequency range between 2.2 and 3.1 THz, achieving a maximum modulation depth of 18%, with a bias as low as 0.5 V.

Item Type:Articles
Additional Information:R.D., D.S.J., Y.D.S., H.E.B., and D.A.R. acknowledge EPSRC for financial support. S.H. acknowledges funding from EPSRC under grant GRAPHTED (project reference EP/K016636/1).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Shah, Dr Yash Diptesh
Authors: Degl’Innocenti, R., Jessop, D. S., Shah, Y. D., Sibik, J., Zeitler, J. A., Kidambi, P. R., Hofmann, S., Beere, H. E., and Ritchie, D. A.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:ACS Nano
Publisher:American Chemical Society
ISSN:1936-0851
ISSN (Online):1936-086X
Published Online:13 February 2014

University Staff: Request a correction | Enlighten Editors: Update this record