Supplementary document for Spectral caustics of high-order harmonics in one-dimensional periodic crystals - 5187253.pdf
journal contributionposted on 30.04.2021, 20:31 by Jiaxiang Chen, Qinzhi Xia, Libin Fu
In Sec. 1, we present the derivation of the Hessian matrix of classical action. In Sec. 2, we make a series of extensive calculations to investigate Fig. 2 in the main text.