Tunable spatial shifts of reflected beam from a polar crystal film sandwiched by dual-twisted black phosphorus gratingsJinhe Wu, Haoyuan Song, Yubo Li, Shaopeng Hao, Qiang Zhang, Sheng Zhou, Shufang Fu and Xuanzhang WangEur. Phys. J. Plus, 139 10 (2024) 897DOI: https://doi.org/10.1140/epjp/s13360-024-05711-0