二维非线性材料MXene增强的全光波长转换器

Two-Dimensional Nonlinear Material MXene-Enhanced All-Optical Wavelength Converter

作为一种新兴的二维材料,MXene是一种具有潜力的非线性光学材料,为此制备Nb_(2)C纳米片并使用分光光度计测量其吸收谱。首先通过氢氟酸刻蚀和液相剥离来制备Nb_(2)C纳米片,然后使用扫描电子显微镜来表征其形貌,最后通过实验对其进行讨论。实验结果表明,MXene所修饰的微纳光纤器件可以在通信波段实现四波混频现象,四波混频的转换效率增强5 dB;对于恒定的泵浦光,信号光的波长变化范围约为4 nm;当波长间隔为0.4 nm时,逐渐增加信号光和泵浦光的放大功率,则四波混频的转换效率会逐渐增加,转换效率和入射功率呈线性关系,转换效率并未出现饱和,为此其具有进一步提升的空间。

As an emerging two-dimensional material, MXene is a potential nonlinear optical material. For this purpose, Nb_(2)C nanosheets are prepared and their absorption spectrum is measured with a spectrophotometer. Firstly, Nb_(2)C nanosheets are prepared by hydrofluoric acid etching and liquid phase exfoliation. Then, the morphology of Nb_(2)C nanosheets is characterized by scanning electron microscopy. Finally, it is discussed through experiments. Experimental results show that the micro-nano fiber device modified by MXene can achieve four-wave mixing in the communication band, and the conversion efficiency of four-wave mixing is increased by 5 dB;for a constant pump light, the wavelength range of signal light is about 4 nm;when the wavelength interval is 0.4 nm, gradually increase the amplification power of the signal light and pump light, the conversion efficiency of the four-wave mixing will gradually increase, the conversion efficiency and the incident power are linear, and the conversion efficiency does not appear to be saturated, so there is room for further improvement.