Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Low-bias terahertz amplitude modulator based on split-ring resonators and graphene
AU - Degl'innocenti, Riccardo
AU - Jessop, David S.
AU - Shah, Yash D.
AU - Sibik, Juraj
AU - Zeitler, J. Axel
AU - Kidambi, Piran R.
AU - Hofmann, Stephan
AU - Beere, Harvey E.
AU - Ritchie, David A.
PY - 2014/3/25
Y1 - 2014/3/25
N2 - 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.
AB - 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.
KW - graphene
KW - metamaterial
KW - optical modulator
KW - optoelectronics
KW - terahertz
KW - time-domain spectroscopy
U2 - 10.1021/nn406136c
DO - 10.1021/nn406136c
M3 - Journal article
AN - SCOPUS:84897004612
VL - 8
SP - 2548
EP - 2554
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 3
ER -