Figure 2. The experimental results

图2.设计的调制器的实验结果。（a）<br>调制器功能区的横截面。观察到的窗口被挖出并通过聚焦离子束（FIB，<br>Carl Zeiss，Oberkochen，德国）观察到，而聚对苯二甲酸乙二酯（PET）基材未穿透。<br>每层的边界都可以通过颜色和纹理来识别。（b）<br>不同放大率的铝膜中的花状结构的显微照片；（c）<br>在SiO 2上的石墨烯片的拉曼光谱<br>。插图：转移的薄片的光学显微照片；（d）<br>器件的传输特性与栅极电压（黑点和线）以及导电电流的关系<br>石墨烯条纹的变化与源漏电压（蓝点和线）的关系。

图2.设计调制器的实验结果。（a） 功能的横截面<br>调制器区域。观测到的窗口由聚焦离子束挖掘和观察（FIB，<br>卡尔蔡司，奥伯科琴，德国），而聚乙烯四聚硫酸盐（PET）基材是未渗透的。<br>每个图层的边界可以通过颜色和纹理来识别;（b）<br>具有不同放大率的铝膜中的花形结构;（c） 拉曼光谱<br>SiO2 上的石墨烯片<br>.内嵌：此转移片的光学显微照片;（d） 转账<br>器件的特性，包括栅极电压（黑点和线）和导电电流<br>石墨烯条状作为源输出电压（蓝点和线）的函数。

Figure 2. The experimental results of the designed modulator. (a) The cross-section of the functionalregion of a modulator. The observed window is dug and observed by a focus ion beam (FIB,Carl Zeiss, Oberkochen, Germany), while the polyethylene terephthalate (PET) substrate is unpenetrated.The boundaries of each layer can be recognized by color and texture; (b) Micrographs of theflower-shaped structure in an aluminum film with different magnification; (c) Raman spectrumof a graphene sheet on SiO2. Inset: optical microscopic photo of this transferred flake; (d) Transfercharacteristic of the device as a function of gate voltages (black dots and line), and conductive currentof graphene stripe as a function of source-drain voltages (blue dots and line).<br>