Nonlinear co-generation of graphene plasmons for optoelectronic logic operations
Yiwei Li, Ning An, Zheyi Lu, Yuchen Wang, Bing Chang, Teng Tan, Xuhan Guo, Xizhen Xu, Jun He, Handing Xia, Zhaohui Wu, Yikai Su, Yuan Liu, Yunjiang Rao, Giancarlo Soavi, Baicheng Yao
Abstract
Surface plasmons in graphene provide a compelling strategy for advanced photonic technologies thanks to their tight confinement, fast response and tunability. Recent advances in the field of all-optical generation of graphene's plasmons in planar waveguides offer a promising method for high-speed signal processing in nanoscale integrated optoelectronic devices. Here, we use two counter propagating frequency combs with temporally synchronized pulses to demonstrate deterministic all-optical generation and electrical control of multiple plasmon polaritons, excited via difference frequency generation (DFG). Electrical tuning of a hybrid graphene-fibre device offers a precise control over the DFG phase-matching, leading to tunable responses of the graphene's plasmons at different frequencies across a broadband (0 ~ 50 THz) and provides a powerful tool for high-speed logic operations. Our results offer insights for plasmonics on hybrid photonic devices based on layered materials and pave the way to high-speed integrated optoelectronic computing circuits.