Ultra-high-speed graphene optical modulator design based on tight field confinement in a slot waveguide
Ultra-high-speed graphene optical modulator design based on tight field confinement in a slot waveguide
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DOI：
10.7567/apex.11.065102
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发表时间：
2018-06-01
影响因子：
2.3
通讯作者：
Yamashita, Shinji
中科院分区：
文献类型：
--
作者：
Kovacevic, Goran;Phare, Christopher;Yamashita, Shinji
我们提出了一种设计的超快速在线石墨烯光调制器的硅波导上的带宽超过100 GHz，非常小的功耗低于15 fJ/位，插入损耗为1.5 dB。这是通过利用横向电模式硅槽来定制石墨烯电极的重叠来实现的，从而显著降低器件的电容，同时保持低插入损耗并使用石墨烯电阻的保守估计。我们的设计是通过全面的有限元法模拟和RC电路表征，以及制造可行性讨论。(C)2018日本应用物理学会
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 substantiated by comprehensive finite-element-method simulations and RC circuit characterization, as well as fabrication feasibility discussion. (C) 2018 The Japan Society of Applied Physics