论文标题
石墨烯中的剪切技术控制的高谐波产生
Shear-Strain Controlled High-Harmonic Generation in Graphene
论文作者
论文摘要
我们提出了一种新的方法，用于控制单层石墨烯中具有高动态范围的高谐波生成（HHG）。我们发现，通过利用剪切应变，可以在几个数量级的范围内进行显着的HHG增强或淬火。范霍夫（Van Hove）奇异性的共振机制使此功能成为可能。在其中，剪切应变控制两个狄拉克锥的构型，从而导致带分散鞍点的能量和偶极矩的变化。我们的发现提供了一种通过使用由单层石墨烯组成的纳米机械设备来调节或开关光的方法。
We propose a novel method for controlling the high-harmonic generation (HHG) with a high dynamic range in single-layer graphene. We find that, by utilizing shear strain, a significant enhancement or quenching of HHG is possible over a range of several orders of magnitude. This feature is made possible by the resonance mechanism at a van Hove singularity. Therein, the shear strain controls the configurations of the two Dirac cones, resulting in changes in the energy and dipole moment at the saddle point of the band dispersion. Our findings provide a way for modulating or switching light by using a nano-optomechanical device composed of single-layer graphene.
