Layer Tunable Third-Harmonic Generation in Multilayer Black Phosphorus
Layer Tunable Third-Harmonic Generation in Multilayer Black Phosphorus
复制标题
DOI：
10.1021/acsphotonics.6b00639
复制
发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
N. Youngblood;Ruoming Peng;A. Nemilentsau;T. Low;Mo Li
中科院分区：
文献类型：
--
作者：
N. Youngblood;Ruoming Peng;A. Nemilentsau;T. Low;Mo Li
黑磷由于其独特的层相关和各向异性的能带结构，已经成为人们越来越感兴趣的主题。虽然许多人已经研究了黑磷的线性光学响应，但非线性响应仍然相对较少被探索。本文报道了用超快近红外激光在黑磷晶体中观察到三次谐波的实验结果，并首次对CHI(3)进行了实验测量。研究发现，由于信号耗尽和相位匹配条件的影响，三次谐波发射具有高度的各向异性，并且与入射偏振有关，并且随着层数的增加而发生强烈的变化。
Black phosphorus has been the subject of growing interest due to its unique band structure that is both layer dependent and anisotropic. While many have studied the linear optical response of black phosphorus, the nonlinear response has remained relatively unexplored. Here we report on the observation of third-harmonic generation in black phosphorus using an ultrafast near-IR laser and measure Chi(3) experimentally for the first time. It was found that the third-harmonic emission is highly anisotropic, dependent on the incident polarization, and varies strongly with the number of layers present due to signal depletion and phase-matching conditions.