All-optical controlling based on nonlinear graphene plasmonic waveguides

作者：Li, Jian; Tao, Jin; Chen, Zan Hui; Huang, Xu Guang^*

来源：Optics Express, 2016, 24(19): 22169-22176.

DOI：10.1364/OE.24.022169

• Absorption changes
• Cross phase modulation
• Effective refractive index
• Integrated optical components
• Photo induced refractive index changes
• Photoinduced absorption
• Plasmonic waveguides
• Signal frequencies

We give the effective refractive index of graphene plasmonic waveguides with both linear and nonlinear effects based on the nonlinear cross-phase modulation, and address the effects of photo-induced refractive index change and absorption change. A non-resonant all-optical nonlinear graphene plasmonic switch with an ultra-compact size of 0.25 mu m(2) is proposed and numerically analyzed based on the dynamics of the photo-induced absorption change. The results show that the all-optical graphene plasmonic switch can realize a broad bandwidth over 5 THz, a potentially very high switching speed and an extinction ratio of 18.14 dB with the electric amplitude of the pump light of 1.5 x 10(7) V/m at the signal frequency of 28 THz. Our study could provide a possibility for future all-optical highly integrated optical components.

• 出版日期2016-9-19