多层膜光栅的含时布拉格衍射
Time-dependent Bragg diffraction bymultilayer gratings
摘要：
本文研究了多层膜光栅的含时布拉格衍射。该研究通过推广先前为一维光子晶体开发的时间相关耦合波理论[Andr{é} J-M和Jonnard P，J. Opt. 17，085609（2015）]以及扩展衍射动力学理论的Takagi-Taupin方法来进行。计算指数响应。它提出了一个时间延迟与瞬态时间是一个函数的消光长度的反射几何形状和消光长度结合的厚度的光栅透射几何形状。
英文摘要：
The time-dependent Bragg diffraction by multilayer gratings working by reflection or by transmission is investigated. The study is performed by generalizing the time-dependent coupled-wave theory previously developed for one-dimensional photonic crystal [Andr{é} J-M and Jonnard P, J. Opt. 17, 085609 (2015)] and also by extending the Takagi-Taupin approach of the dynamical theory of diffraction. The indicial response is calculated. It presents a time-delay with a transient time that is a function of the extinction length for reflection geometry and of the extinction length combined with the thickness of the grating for transmission geometry.
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