Electrically Tunable Graphene-on-polyimide Terahertz Modulators

Paper (ELEC 1)

Wed, 11 Nov 2020 06:30pm to 06:45pm

Room: Seneca

Attend in Zoom

We report a graphene-on-polyimide THz modulator with a tunable-by-design optical bandwidth, a 90% modulation efficiency, a 20 KHz electrical bandwidth and tunable in the 1.9-2.7 THz range. The electrostatic tuning of the THz conductivity is achieved through a grating gate coupler on the top of the polyimide waveguide. By coupling the modulator with a THz quantum cascade laser frequency comb, we show it can fully compensate the cavity dispersion, resulting in stable frequency comb operation over a 45% dynamic range.

Presenters and Authors Info

Presenter: Anonymous

Authors: Di Gaspare, Alessandra; Pogna, Eva A. A.; Salemi, Luca; Balci, Osman; Cadore, Allison; Shinde, Sachin M.; di Franco, Cinzia; Ferrari, Andrea C.; Scamarcio, Gaetano; Vitiello, Miriam S.

Cambridge Graphene Centre, CNR-IFN and Dipartimento Interateneo di Fisica, Università degli Studi di Bari, CNR-NANO, NEST, CNR-NANO and Scuola Normale Superiore