Ultrafast optical modulation of magneto-optical terahertz effects occurring in a graphene-loaded resonant metasurface
Year: 2016
Authors: Zanotto S., Lange C., Maag T., Pitanti A., Miseikis V., Coletti C., Degl’Innocenti R., Baldacci L., Huber R., Tredicucci A.
Autors Affiliation: CNR, Ist Nazl Ott, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; Univ Regensburg, Dept Phys, D-93040 Regensburg, Germany; CNR, Ist Nanosci, NEST, Piazza San Silvestro 12, I-56127 Pisa, Italy; Scuola Normale Super Pisa, Piazza San Silvestro 12, I-56127 Pisa, Italy; Ist Italiano Tecnol, CNI NEST, Pza S Silvestro 12, I-56127 Pisa, Italy; Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England; Scuola Super Sant Anna, Inst Life Sci, Pza Martiri della Liberta 33, I-56127 Pisa, Italy; Univ Pisa, CNR, Ist Nanosci, NEST, Lgo Pontecorvo 3, I-56127 Pisa, Italy; Univ Pisa, Dipartimento Fis E Fermi, Lgo Pontecorvo 3, I-56127 Pisa, Italy
Abstract: In this paper we investigate the effect of a static magnetic field and of optical pumping on the transmittance of a hybrid graphene-split ring resonator metasurface. A significant modulation of the transmitted spectra is obtained, both by optical pumping, and by a combination of optical pumping and magnetostatic biasing. The transmittance modulation features spectral fingerprints that are characteristic of a non-trivial interplay between the bare graphene response and the split ring resonance.
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KeyWords: terahertz; graphene; split-ring; magneto-optic; metasurface