6 papers
Time domain Stokes mechanism of pair correlated k gap solitons in nonlinear photonic time crystal slabs
Jiaxiang Sun, Guowei Chen, Liang Zhang +1
Pair generation in time-varying media is commonly attributed to time reflection at temporal boundaries or to amplification inside momentum k gaps. Here we show that these two proce…
Breathing k-Gap Events and Instability on Instability in Nonlinear Photonic Time Crystals
Liang Zhang, Chenhao Pan, Yiming Pan
Photonic time crystals (PTCs) host momentum bandgaps, or k gaps, that enable parametric amplification and lasing of seeded fields. In nonlinear PTCs, Kerr saturation dynamically su…
Quantization and Biphoton Statistics of k-Gap Solitons in Nonlinear Photonic Time Crystals
Liang Zhang, Chenhao Pan, Yiming Pan
Nonlinear photonic time crystals (PTCs) can support solitons inside momentum k gaps, where the amplification of k gap modes is saturated by Kerr nonlinearity, forming spatially hom…
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…
Generating and Weaving Topological Event Wavepackets in Photonic Spacetime Crystals with Fully Energy-Momentum Gapped
Liang Zhang, Zirui Zhao, Qiaofei Pan +3
We propose a novel type of topological excitation topological event wavepackets (TEWs) emerging in photonic spacetime crystals (STCs) with spacetime modulated dielectric constants.…
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…