Connected hidden singularities and toward successive state flipping in degenerate optical microcavities
Connected hidden singularities and toward successive state flipping in degenerate optical microcavities
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DOI：
10.1364/josab.34.000238
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发表时间：
2017-02
影响因子：
1.9
通讯作者：
A. Laha;Somnath Ghosh
中科院分区：
文献类型：
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作者：
A. Laha;Somnath Ghosh
利用散射矩阵形式，我们报告了非均匀泵浦简并光学微腔中连接多个二阶隐藏奇异点的特殊隐藏奇异线的形成。这种奇点被称为例外点（EP），而这条线被认为是例外线。探索非传统的行为腔共振产生的空间不平衡的增益-损耗分布，我们已经建立了绝热状态翻转机制的耦合共振遇到这样的EP。各种有趣的包围情况下，结合平滑以及波动的控制参数的变化，进行了分析。我们利用上述方案的第一次，尽我们所知，分析的光学性能和稳定性的级联状态翻转现象的协助下，连续包围的单个或多个奇点以下的例外线的上下文中的光学模式转换器。
Using scattering matrix formalism, we report the formation of a special hidden singular line connecting multiple second-order hidden singular points, in a non-uniformly pumped degenerate optical microcavity. Such singularities are known as exceptional points (EPs), and the line is proposed as an exceptional line. Exploring the unconventional behavior of cavity resonances created by a spatially imbalanced gain–loss profile, we have established the adiabatic state-flipping mechanism of coupled resonances encountering such EPs. Various interesting encircling situations, incorporating smooth as well as fluctuating variations of the control parameters, have been analyzed. We exploit the above scheme for the first time, to the best of our knowledge, to analyze the optical performance and stability of the cascaded flip-of-state phenomenon assisted by successive encirclement of either single or multiple singularities following the exceptional line in the context of optical mode converters.