Optically driven effective Faraday effect in instantaneous nonlinear media
Optically driven effective Faraday effect in instantaneous nonlinear media
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DOI：
10.1364/optica.6.001152
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发表时间：
2019-09-20
期刊：
影响因子：
10.4
通讯作者：
Alu, Andrea
中科院分区：
文献类型：
--
作者：
Duggan, Robert;Sounas, Dimitrios;Alu, Andrea
法拉第旋转可以说是研究最广泛的非互易现象，当波在磁光材料中传播时，可以观察到偏振旋转的形式。它是实现各种形式的隔离器和环行器的基础。然而，磁光材料体积大，难于集成，并且与损耗有内在的联系。在这里，我们利用传统光学晶体中的非线性现象来模拟谐振腔中的法拉第旋转，该谐振腔由两个具有相反圆极化和轻微失谐的频率的泵浦激发。这种效应可以在基本谐振结构中观察到，不需要材料共振或定制的色散，不需要泵浦的任意频率和低损耗，这为实现紧凑的无磁非互易光学元件提供了一条有趣的途径。(C)OSA开放获取出版协议条款下的2019年美国光学学会
Faraday rotation is arguably the most widely studied nonreciprocal phenomenon, observable in the form of polarization rotation as waves travel in magneto-optical materials. It is at the basis of the realization of various forms of isolators and circulators. However, magneto-optical materials are bulky and difficult to integrate, and inherently associated with losses. Here we leverage nonlinear phenomena in conventional optical crystals to mimic Faraday rotation in a resonant cavity excited with two pumps with opposite circular polarizations and slightly detuned frequencies. The effect can be observed in basic resonant structures with no need for material resonances or tailored dispersion, arbitrary frequency of the pumps, and low loss, yielding an interesting path towards the realization of compact magnet-free nonreciprocal optical elements. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement