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arXiv 1407.4276physics.optics
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非线性相干完全吸收

Nonlinear Coherent Perfect Absorption

K. Nireekshan Reddy, S. Dutta Gupta

摘要:

我们回顾了最近的一些概念和他们的实现利用完美的相消干涉的光在微米和纳米结构。一种是指可以控制有效吸收并使其最大化以实现完美吸收的光学结构。所报道的效应主要取决于激发辐射的相干性。用单个(两个或更多)入射平面波(波)实现的效果带有临界耦合(相干完美吸收)的名称。因此,在支持临界耦合(CC)或相干完全吸收(CPA)的系统中,所有入射辐射都可以被吸收,导致零散射。特别地,如果系统支持多模态结构的特定模式,则所有入射光能量可以被引导到这种模式中。我们提出了一个简短的概述CC和CPA在线性系统中叙述其基本概念的时间反演激光和他们的一些未来的应用。接下来,我们回顾我们的工作CC和CPA的非线性扩展的一个或多个分层介质可以是非线性的克尔型非线性。色散非线性被证明是提供了一个实际的处理过程中的完美吸收入射激光功率。进一步证明了这种非线性周期结构可以支持吸收所有入射能量而不散射任何光的间隙孤子

英文摘要:

We review some of the recent concepts and their realization exploiting the perfect destructive interference of light in micro and nano structures. One refers to optical structures where the effective absorption can be controlled and maximized to perfect absorption. The reported effects depend crucially on the coherent nature of the exciting radiation. Achieved with a single (two or more) incident plane wave (waves) the effect carries the name of critical coupling (coherent perfect absorption). Thus in a system supporting critical coupling (CC) or coherent perfect absorption (CPA) all the incident radiation can be absorbed leading to null scattering. In particular all the incident light energy can be channeled into a specified mode of a multimodal structure if such modes are supported by the system. We present a brief overview of CC and CPA in linear systems to recount their underlying concepts as time-reversed lasing and some of their futuristic applications. Next we review our work on the nonlinear extensions of CC and CPA where one or more of the layered media could be nonlinear with Kerr-type nonlinearity. The dispersive nonlinearity is shown to offer a practical handle over the process of perfect absorption by incident laser power. Further we show that the nonlinear periodic structure can support gap solitons which absorbs all the incident energy and do not scatter any light outside the hetero-guide

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