论文标题
浆果曲率诱导的高激光谐波在时间变换材料中
High laser harmonics induced by the Berry curvature in time-reversal invariant materials
论文作者
论文摘要
由于频段的非平凡拓扑，在广泛的时间反转材料中具有高谐波生成的高谐波生成（最近已经建立了非线性霍尔效应）。一种描述带有频段非零浆果曲率对强激光场的伪偏移电子的非扰动光学响应的微观准经典理论。我们分析了诱导电流的谐波含量，并表明只能通过频带的浆果曲率将诱导的激光谐波解矛。我们还研究了非线性响应对驱动波和系统参数的依赖性。
A new nonlinear scheme of high harmonics generation in a wide class of time-reversal invariant materials with broken spatial inversion symmetry (where recently the nonlinear Hall effect has been established) due to the nontrivial topology of bands is proposed. A microscopic quasiclassical theory describing the nonperturbative optical response of pseudo-relativistic electrons with nonzero Berry curvature of bands to a strong laser field is developed. We analyze the harmonic content of the induced current and show that one can decouple induced laser harmonics solely by the Berry curvature of bands. We also study the dependence of the nonlinear response on the driving wave and system parameters.
