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)
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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 |
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