论文标题
双层石墨烯的Optotwistronic
Optotwistronic of bilayer graphene
论文作者
论文摘要
我们介绍了一项研究扭曲双层石墨烯的非线性光学响应。我们讨论了逆转对称对称性时，浆果阶段对非线性的贡献，从而强调了频带和真实空间几何形状和非线性响应之间的相互作用。我们还强调了极端非线性光学特征的效果：变相的谐波产生。由于带宽度大大减少，这种效果在相对中等场的强度下出现在扭曲的双层石墨烯中。我们的发现有助于理解几何和光学特性之间的联系，以及扭曲双层石墨烯中极端非线性光学状态
We present a study of the nonlinear optical response of twisted bilayer graphene. We discuss the contribution of the Berry phase to the non-linearity when inversion symmetry is broken, thus underlining the interplay between band and real space geometry, and nonlinear response. We also highlight an effect which is characteristic of extreme nonlinear optics: the generation of harmonics in disguise. This effect emerges in twisted bilayer graphene at relatively moderate fields strengths because of the much reduced band width. Our findings contribute to the understanding of the link between geometry and optical properties, as well as of the extreme nonlinear optical regime in twisted bilayer graphene
