A Tunable Dispersion Waveguide Based on Graphene-Silicon Lateral Slot Geometric Structure
A Tunable Dispersion Waveguide Based on Graphene-Silicon Lateral Slot Geometric Structure
复制标题
基于石墨烯-硅横向槽几何结构的可调谐色散波导
DOI：
10.1109/jphot.2017.2654447
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发表时间：
2017
影响因子：
2.4
通讯作者：
Han Jing
中科院分区：
文献类型：
--
作者：
Li Zhen;Liu Hongjun;Huang Nan;Wang Zhaolu;Han Jing
研究了一种三层石墨烯结构的石墨烯-硅混合缝隙波导的色散特性。通过调节石墨烯层上的偏置电压，可以动态有效地调整HyGS缝隙波导的零色散波长。通过数值模拟验证，在不改变波导几何结构的情况下，利用小的扰动电压（6 V）实现了大的ZDW调谐量（200 nm）。此外，在ZDW附近，HyGS槽波导的色散曲线足够平坦（群速度色散斜率小于2 ps/nm 2·km）。这种波导对于集成光学和石墨烯相关的有源光学器件等应用非常有益。
The dispersion profiles of a hybrid graphene-silicon (HyGS) slot waveguide with trilayers of graphene are investigated in this paper. By tuning the bias voltage on graphene layer, the zero dispersion wavelengths (ZDW) of HyGS slot waveguide can be tailored dynamically and effectively. With small disturbed voltage (6 V), a large ZDW tuning amount (200 nm) is achieved, without the need for changing the geometric structure of the waveguide, which has been verified with numerical simulation. Moreover, the dispersion curve of HyGS slot waveguide is flat enough (group velocity dispersion slope less than 2 ps/nm2·km), in the vicinity of ZDW. This waveguide is highly beneficial to such applications as integrated optics and graphene-related active optical devices.