具有非瞬时立方非线性多层膜系统中的脉冲碰撞效应
Effects of pulse collisions in a multilayer system with noninstantaneous cubic nonlinearity
摘要：
对超短脉冲在一维非线性光子晶体中的传输进行了数值模拟。在这种多层膜系统中，三次非线性的弛豫是产生脉冲自陷效应的原因。在本文中，我们研究了这种效应的进一步影响。结果表明，捕获的光吸收额外的低强度脉冲，不能自陷\textit{per se}。另一方面，当光由于两个这样的脉冲的碰撞而被捕获时，这样的低强度脉冲是所谓的诱导捕获的对象。我们认为这种效果的条件在这两种情况下的共同和反传播脉冲。
英文摘要：
The numerical simulations of an ultrashort pulse propagation in a one-dimensional nonlinear photonic crystal are carried out. It is known that the relaxation of cubic nonlinearity is the reason for the effect of pulse self-trapping in such multilayer system. In this paper we study further implications of this effect. It is shown that the trapped light absorbs additional low-intensity pulses which cannot be self-trapped \textit{per se}. On the other hand, such low-intensity pulses are subject of the so-called induced trapping when light gets trapped due to a collision of two such pulses. We consider the conditions for this effect in both cases of co- and counter-propagating pulses.
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