Ultra-high-speed graphene optical modulator design based on tight field confinement in a slot waveguide

Goran Kovacevic, Christopher Phare, Sze Y. Set, Michal Lipson, Shinji Yamashita
2018 Applied Physics Express  
We present a design of an ultra-fast in-line graphene optical modulator on a silicon waveguide with a bandwidth exceeding 100 GHz, very small power consumption below 15 fJ/bit, and insertion loss of 1.5 dB. This is achieved by utilizing the transverse-electric-mode silicon slot to tailor the overlap of graphene electrodes, thus significantly reducing the capacitance of the device while maintaining a low insertion loss and using conservative estimates of the graphene resistance. Our design is
more » ... stantiated by comprehensive finite-element-method simulations and RC circuit characterization, as well as fabrication feasibility discussion.
doi:10.7567/apex.11.065102 fatcat:qk6mwldiqfgv5knvfqdukphhey