论文标题
II型Weyl Fermions的非线性光学响应在两个维度
Nonlinear optical response of Type-II Weyl fermions in two dimensions
论文作者
论文摘要
我们提出了一个理论模型，用于研究具有低能谱的材料的非线性光学响应，其特征在于强烈的倾斜，II型，Weyl锥的二维，我们称之为2D Weyl材料。我们的发现表明，Weyl锥的倾斜性质是导致非线性信号中均匀谐波的出现及其强极化依赖性的。我们讨论如何控制这种非线性响应，并设想如何使用2D Weyl材料来实现用于传感应用的新型光子设备。
We present a theoretical model to study the nonlinear optical response of materials with a low-energy spectrum characterised by strongly tilted, type-II, Weyl cones in two dimensions, which we call 2D Weyl materials. Our findings reveal that the tilted nature of the Weyl cones is responsible for the appearance of even harmonics in the nonlinear signal, as well as its strong polarisation dependence. We discuss how it is possible to control such nonlinear response and envision how 2D Weyl materials can be used to realise novel photonic devices for sensing applications.
