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Transit-time of electromagnetic Gaussian packets traversing nonlinear periodic layered systems

机译：电磁高斯包穿越非线性周期分层系统的穿越时间

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摘要

We investigate the transmission of Gaussian packets of light in periodic binary multilayers with the two constituent materials having dielectric constant dependent on the electric field intensity. The transmission spectra for the linear response and for the second and third harmonics were calculated within the undepleted approximation. For the transit-time calculation we use the stationary phase method. The wave packets were constructed with the mid-frequency lying either at the lower gap edge, at the mid-gap or at the higher gap edge of the first photonic band gap of the linear contribution. In some cases the transmitted packets (of both the linear and harmonic responses) preserve the form, but not the mid-frequency values; in other cases the transmitted packets unfold producing peaks that leave the super-lattice at different times.
机译：我们研究了高斯光包在周期性二元多层结构中的透射，其中两种构成材料的介电常数取决于电场强度。在未耗尽的近似值范围内，计算了线性响应以及二次谐波和三次谐波的透射光谱。对于渡越时间的计算，我们使用固定相法。构造的波包的中频位于线性贡献的第一个光子带隙的较低间隙边缘，中间隙或较高间隙边缘。在某些情况下，传输的数据包（线性和谐波响应）均保留格式，但不保留中频值。在其他情况下，传输的数据包会展开，产生峰值，并在不同的时间离开超晶格。

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