Based on femtosecond laser ablated processing, one-dimensional arrays with different line spacings were fabricated on titanium disulfide (TiS2) nanosheet. Optical modulated measurements with these devices were demonstrated. Photo-induced complex conductivity changes of the TiS2 nanosheet devices were studied by an optical-pump THz-probe (OPTP) measurement system. For the 700 μm line spacing device, the optically introduced modulation depth (MD) reached up to 70%. Our experimental results have demonstrated the ultrafast dynamics and photoconductivity for the TiS2 nanosheet devices in the THz frequency range. TiS2 nanosheet based devices would be suitable as the photoelectric modulators of THz wave.

中文翻译：

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飞秒激光烧蚀二硫化钛纳米片器件的光学调谐宽带太赫兹调制、载流子动力学和光电导率

基于飞秒激光烧蚀加工，在二硫化钛（TiS2）纳米片上制备了具有不同线间距的一维阵列。演示了使用这些设备进行的光调制测量。通过光泵太赫兹探针 (OPTP) 测量系统研究了 TiS2 纳米片器件的光致复杂电导率变化。对于 700 μm 线距器件，光引入调制深度 (MD) 高达 70%。我们的实验结果证明了 TiS2 纳米片器件在太赫兹频率范围内的超快动力学和光电导率。基于 TiS2 纳米片的器件将适合作为太赫兹波的光电调制器。