2026-10-14T18:41:30Z https://www.scidb.cn/oai

10.57760/sciencedb.16486 2024-03-01T10:53:54Z

2024-03-01 Orientation-dependent high harmonic generation from h-BN doi:10.57760/sciencedb.16486 en We investigate high harmonic generation from monolayer h-BN by solving the semiconductor Bloch equations. The parallel-polarized odd-order harmonics at the cut-off region show anomalous angular dependence that the angular distribution of odd orders over 7.31eV exhibit a 30◦ shift with respect to others. We find that the harmonic energy is correlated to dynamics at the k dependent bandgap at the M point in the reciprocal space. Time frequency analysis indicates that the harmonics in the cut-off region along the zigzag direction are only generated in a specific polarity of the laser half-cycle, contributing to the observed angular shift. The phenomenon has significant implications for utilizing high harmonic spectroscopy in reconstructing the electronic bands. high harmonic generation; two-dimensional material.; Orientation-dependent Zheng Wenyang Liu Candong Bai Ya Liu Peng Li Ruxin PUBLIC https://creativecommons.org/publicdomain/zero/1.0/ dataset Science Data Bank