Interaction of intense lasers with solid materials offers an alternative way to achieve high-order harmonic generation (HHG). Since the underlying mechanisms of the harmonic emission remain uncertain, a large number of theoretical studies have been proposed to explain the experimental findings in this fast-growing field. Here, we review the primary numerical methods and present a brief perspective of HHG in solids.

中文翻译：

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固体中高次谐波的产生：近代数值方法综述

强激光与固体材料的相互作用提供了一种实现高次谐波产生（HHG）的替代方法。由于谐波发射的潜在机制仍然不确定，因此提出了许多理论研究来解释这一快速增长领域的实验结果。在这里，我们回顾了主要的数值方法，并简要介绍了固体中HHG的前景。