黑磷在溶液分散体中的超快非线性光学响应。

Key Laboratory for Micro-/Nano- Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, 410082, China.

Femtosecond Optics Group, Department of Physics, Imperial College London, London, SW7 2BW, UK.

Sci Rep. 2017 Jun 13;7(1):3352. doi: 10.1038/s41598-017-03667-z.

We report the spatial self-phase modulation (SSPM) effect for solution dispersions of black phosphorus (BP). The experimental results suggest that this concentration-dependent coherent light diffraction is due to the ultrafast and large third-order optical nonlinearity of BP. The third-order nonlinear susceptibility of BP has been simply obtained about 10 m/V by analyzing the experimental results. The fast relaxation time during dynamic relaxation is obtained as 0.13 ps. Our experimental results imply novel potential application of BP in ultrafast nonlinear phase modulation devices based on their nonlinear optical response.

我们报告了黑磷（BP）溶液分散体的空间自相位调制（SSPM）效应。实验结果表明，这种浓度依赖的相干光衍射是由于 BP 的超快和大的三阶光学非线性。通过分析实验结果，简单地得到了 BP 的三阶非线性极化率约为 10 m/V。在动态弛豫过程中，快弛豫时间为 0.13 ps。我们的实验结果表明，基于其非线性光学响应，BP 在超快非线性相位调制器件中有新的潜在应用。