3 papers
physics.optics2025
Electric-Magnetic-Switchable Free-Space Skyrmions in Toroidal Light Pulses via a Nonlinear Metasurface
Li Niu, Xi Feng, Xueqian Zhang +10
Recent advances reveal that light propagation in free space supports many exotic topological textures, such as skyrmions. Their unique space-time topologies make them promising can…
physics.optics2024
Photonic Terahertz Phased Array
Li Niu, Xi Feng, Xueqian Zhang +11
Phased arrays are crucial in various technologies, such as radar and wireless communications, due to their ability to precisely control and steer electromagnetic waves. This precis…
physics.optics2024
Time-varying Nonlinear Effects in Terahertz Generation
Yongchang Lu, Xueqian Zhang, Haidi Qiu +6
Time-varying effects have unveiled new possibilities for manipulating electromagnetic waves through the temporal dimension. In this study, we experimentally explore these effects i…