Enhanced Supercontinuum Generation in Integrated Waveguides Incorporated with Graphene Oxide Films
Enhanced Supercontinuum Generation in Integrated Waveguides Incorporated with Graphene Oxide Films
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DOI：
10.1002/admt.202201796
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发表时间：
2023-01
影响因子：
6.8
通讯作者：
Yuning Zhang;Jiayang Wu;Yunyi Yang;Y. Qu;L. Jia;H. E. Dirani;S. Kerdilès;C. Sciancalepore;Pierre Demongodin;C. Grillet;C. Monat;Baohua Jia;D. Moss
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文献类型：
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作者：
Yuning Zhang;Jiayang Wu;Yunyi Yang;Y. Qu;L. Jia;H. E. Dirani;S. Kerdilès;C. Sciancalepore;Pierre Demongodin;C. Grillet;C. Monat;Baohua Jia;D. Moss
增强超连续谱产生（SCG）的实验证明，在集成氮化硅（Si3N4）波导纳入高度非线性氧化石墨烯（GO）的形式的2D薄膜。通过使用无转移和逐层涂覆方法实现2D GO膜的片上集成，并精确控制其厚度。薄膜长度和涂层位置的控制是通过在光子集成芯片的上二氧化硅包层中打开窗口来实现的。详细的SCG测量使用不同的波导几何形状和GO膜厚度的制造设备进行，并与没有GO的设备的结果进行比较。显著改善的光谱展宽的超短光脉冲的峰值功率超过1000 W的混合装置，实现了高达2.4倍的改善，在光谱带宽相对于没有GO的设备。理论分析的GO膜厚度的影响，涂层长度，涂层的位置，和波导的几何形状也提供了通过拟合的实验结果与理论，表明仍有显着的进一步改进的空间。这项工作开辟了一条新的途径，通过将功能性的二维材料，提高光子集成器件的SCG性能。
Enhanced supercontinuum generation (SCG) is experimentally demonstrated in integrated silicon nitride (Si3N4) waveguides incorporating highly nonlinear graphene oxide (GO) in the form of 2D films. On‐chip integration of the 2D GO films with precise control of their thickness is realized by using a transfer‐free and layer‐by‐layer coating method. The control of the film length and coating position is achieved via window opening in the upper silica cladding of the photonic integrated chips. Detailed SCG measurements are performed using the fabricated devices with different waveguide geometries and GO film thicknesses, and the results are compared with devices without GO. Significantly improved spectral broadening of ultrashort optical pulses with ultrahigh peak powers exceeding 1000 W is observed for the hybrid devices, achieving up to 2.4 times improvement in the spectral bandwidth relative to devices without GO. Theoretical analyses for the influence of GO film thickness, coating length, coating position, and waveguide geometry are also provided by fitting the experimental results with theory, showing that there is still significant room for further improvement. This work opens up a new avenue toward improving the SCG performance of photonic integrated devices by incorporating functional 2D materials.