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石墨烯材料应用到各种光波导器件中正成为新一代光子器件的重要发展方向之一,目前基于石墨烯的光纤和集成光子器件研究越来越受到国内外的重视.本文建立了一种由微纳光纤耦合光倏逝场,并在石墨烯薄膜中传输的模型.通过有限元分析法,研究了光在这种石墨烯波导中传输光场的强度分布和相位特性,并通过实验进行了验证.结果表明,沿着微纳光纤-石墨烯光波导传播的倏逝场的强度分布和相位均受石墨烯材料作用,石墨烯材料能有效聚集和导行波导中传输的高阶模,在单位传输长度上具有更密集的等相位面.本文提出了一种利用微纳光纤耦合光倏逝场研究石墨烯相位响应特性的新方法,对基于石墨烯波导的新型调制器、滤波器、激光器和传感器等光子器件的设计和应用具有一定的参考意义.
The application of graphene to various optical waveguides is becoming one of the important development directions of the new generation of photonic devices.At present, more and more attention has been paid to graphene-based optical fiber and integrated photonic devices.Firstly, Fiber coupled light evanescent field and propagated in graphene films.The strength distribution and phase characteristics of light propagating in this graphene waveguide were studied by finite element analysis and verified by experiments The results show that the intensity distribution and the phase of the evanescent field propagating along the micro / nano optical fiber - graphene optical waveguide are all affected by the graphene material, the graphene material can effectively aggregate and guide the high order modes transmitted in the waveguide, Has a more dense equi-phase surface.In this paper, we propose a new method to study the phase response of graphene by using the coupled evanescent field of the micro-nano fiber, and present a new type of modulator, filter, laser and sensor based on graphene waveguide Photonic devices design and application of a certain reference value.