Front-induced transitions
Front-induced transitions
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DOI：
10.1038/s41566-019-0511-6
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发表时间：
2019-09
期刊：
影响因子：
35
通讯作者：
M. Gaafar;T. Baba;M. Eich;A. Petrov
中科院分区：
文献类型：
--
作者：
M. Gaafar;T. Baba;M. Eich;A. Petrov
波导中传播的折射率波阵面是一种特殊的时空微扰。光与这种波前的相互作用可以用间接跃迁来描述，在间接跃迁中，导模的频率和波数都改变。近年来，前向诱导跃迁已被用于色散工程光波导中，用于频率转换、光学延迟以及带宽和脉冲宽度控制。这些概念起源于光子学的不同研究领域，如非线性光纤光学、慢光波导、等离子体物理、运动介质和相对论效应。在这里，我们讨论了这些概念，提供了一个统一的理论描述，并强调了这一令人兴奋的研究领域在引导光学中光操纵的潜力。
Refractive index fronts propagating in waveguides are special spatiotemporal perturbations. The interaction of light with such fronts can be described in terms of an indirect transition where the frequency and wavenumber of a guided mode both are changed. In recent years, front-induced transitions have been used in dispersion-engineered waveguides for frequency conversion, optical delays, and bandwidth and pulse duration manipulation. These concepts have originated from different research areas of photonics, such as nonlinear fibre optics, slow-light waveguides, plasma physics, moving media and relativistic effects. Here, we discuss these concepts, providing a unifying theoretical description and highlight the potential of this exciting research field for light manipulation in guided optics.