共振吸收介质中基于扭结的无镜准双稳态
Kink-based mirrorless quasi-bistability in resonantly absorbing media
摘要：
光学双稳态是光控制光的基本非线性现象，它为激光信息技术中大量应用的最终需求全光逻辑铺平了道路。光开关元件的理想特性是低功耗、开关速度和小尺寸。这两种最常见的设计是由外部反馈的存在或不存在所驱动的，从而产生各种可能的设置。其中，无反射镜架构似乎是有前途的是免费的笨重的镜子，谐振腔，光子晶体，在本文中，我们提出了一种新的方法来实现光学准双稳态的形成特定的非线性波形称为“扭结”。我们表明，一个薄层的相对稀释的谐振介质专门设计用于支持扭结可以作为一个平台，紧凑，超快，低功耗的光开关。这种新的物理机制不需要特定于由局部场校正和偶极-偶极相互作用驱动的其他无反馈器件的高密度共振粒子，并且增强了这种器件用于光学计算的整体实际相关性。
英文摘要：
Optical bistability, the basic nonlinear phenomenon mediating the control of light by light, paves the way to the all-optical logic being of ultimate demand for a plethora of applications in laser information technologies. The desirable features of the optically bistable elements are low power consumption, speed of switching and small size. The two most general designs are driven by the presence or absence of an external feedback giving rise to a variety of possible setups. Among them, mirrorless architecture seems promising being free of bulky mirrors, resonant cavities, photonic crystals, etc. In this paper, we propose a novel method to achieve optical quasi-bistability governed by the formation of specific nonlinear waveforms called "kinks". We show that a thin layer of the relatively dilute resonant medium specially designed to support kinks could serve as a platform for compact, ultra-fast, low power optical switching. This new physical mechanism do not require high densities of resonant particles specific for other feedback-free devices driven by local field corrections and dipole-dipole interactions, and enhance the overall practical relevance of such devices for optical computing.
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