Observation of intense second harmonic generation from MoS2 atomic crystals
Observation of intense second harmonic generation from MoS2 atomic crystals
复制标题
DOI：
10.1103/physrevb.87.201401
复制
发表时间：
2013-05-13
影响因子：
3.7
通讯作者：
de Paula, Ana M.
中科院分区：
文献类型：
--
作者：
Malard, Leandro M.;Alencar, Thonimar V.;de Paula, Ana M.
使用飞秒激光脉冲研究了几层MOS2二维晶体的非线性光学特性。我们观察到了从奇数晶体中高效的第二谐波产生，该晶体显示了极化强度的依赖性，直接揭示了晶体的潜在对称性和方向。另外，测得的二阶敏感性光谱提供了有关材料电子结构的信息。我们的结果为研究这些二维晶体中的非线性光学特性提供了机会。
The nonlinear optical properties of few-layer MoS2 two-dimensional crystals are studied using femtosecond laser pulses. We observed highly efficient second-harmonic generation from the odd-layer crystals, which shows a polarization intensity dependence that directly reveals the underlying symmetry and orientation of the crystal. Additionally, the measured second-order susceptibility spectra provide information about the electronic structure of the material. Our results open up opportunities for studying the nonlinear optical properties in these two-dimensional crystals.