非线性纳米光子电路：三稳态和非稳态多谐振荡器与混沌Generator
Nonlinear Nanophotonic Circuitry: Tristable and Astable Multivibrators and Chaos Generator
摘要：
集总光学纳米元件（或元电子学）的概念，其中纳米尺度的结构作为纳米电感器，纳米电容器和纳米电阻器，已经吸引了大量的关注，作为一个简单的工具箱工程不同的纳米光子器件与微电子学的类比。虽然最近的研究主要集中在线性功能上，但微电子器件中的非线性动力学起着至关重要的作用，并提供了现代应用中使用的大多数功能。在这里，我们扩展了元电子学的范例，并添加非线性动力学模式的纳米光子器件，从来没有与光学纳米天线。具体而言，我们表明，非线性二聚体纳米天线可以在三稳态和非稳态多谐振荡器以及混沌发生器的制度。这些模式背后的物理机制依赖于二聚体中纳米颗粒的克尔型非线性，其通过偶极局部表面等离子体共振增强。这允许在中等光强下提供正的非线性反馈，从而通过调节驱动场参数来产生期望的动力学行为。我们的研究结果揭示了一类新的非线性纳米光子器件具有可调的非线性动力学响应。
英文摘要：
The concept of lumped optical nanoelements (or metactronics), wherein nanometer-scale structures act as nanoinductors, nanocapacitors and nanoresistors, has attracted a great deal of attention as a simple toolbox for engineering different nanophotonic devices in analogy with microelectronics. While recent studies of the topic have been predominantly focused on linear functionalities, nonlinear dynamics in microelectronic devices plays a crucial role and provides a majority of functions, employed in modern applications. Here, we extend the metactronics paradigm and add nonlinear dynamical modalities to those nanophotonic devices that have never been associated with optical nanoantennas. Specifically, we show that nonlinear dimer nanoantennae can operate in the regimes of tristable and astable multivibrators as well as chaos generators. The physical mechanism behind these modalities relies on the Kerr-type nonlinearity of nanoparticles in the dimer enhanced by a dipolar localized surface plasmon resonance. This allows one to provide a positive nonlinear feedback at moderate optical intensities, leading to the desired dynamical behavior via tuning the driving field parameters. Our findings shed light on a novel class of nonlinear nanophotonic devices with a tunable nonlinear dynamical response.
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