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physics.optics2025
Topologically-protected superluminal pair annihilation in photonic time crystals
Liang Zhang, Chenhao Pan, Jinze He +4
Photonic time crystals (PTCs) - dielectric media whose permittivity is periodically modulated in time - map to a Dirac equation with an imaginary mass, opening a momentum gap (k-ga…
physics.optics2025
Broadband nonlinear optical microresonator array for topological second harmonic generation
Ruoyu Wang, Yiming Pan, Xiaoqin Shen
Topological photonics enables robust light manipulation with third-order optical nonlinearity, yet integrating second-order optical nonlinearity into a topological system faces fun…
physics.optics2025
Event Soliton Formation in Mixed Energy-Momentum Gaps of Nonlinear Spacetime Crystals
Liang Zhang, Zhiwei Fan, Yiming Pan
We report the formation of a novel soliton, termed event soliton, in nonlinear photonic spacetime crystals (STCs). In these media, simultaneous spatiotemporal periodic modulation o…