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) Low-bias terahertz amplitude modulator based on split-ring resonators and graphene. ACS Nano, 8 (3). pp. 2548-2554. ISSN 1936-0851
Full text not available from this repository.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.