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physics.optics2026
Observation of full momentum bandgap in photonic time crystals
Bolun Huang, Zebin Zhu, Genrong Yu +1
The hallmark feature of photonic time crystals (PTCs) is the momentum bandgap, yet opening such a gap is extremely challenging, as it demands strong and rapid temporal modulation o…
physics.optics2026
Space and space-time topologies in a type-II hyperbolic lattice
Jingming Chen, Zebin Zhu, Minqi Cheng +3
Recent breakthroughs in hyperbolic lattices have expanded the study of topological phases of matter from Euclidean to non-Euclidean spaces. However, prior work has mostly focused o…
physics.optics2025
Spatiotemporal topological phase transitions in photonic spacetime crystals
Zebin Zhu, Bolun Huang, Siqi Xu +5
Topological phase transitions, characterized by the closing and reopening of band gaps and a concomitant change in topological invariants, have played a central role in topological…