Controllable chaos in the coupled waveguide-optomechanical system with phase shifter

IF 6.4 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Science China Physics, Mechanics & Astronomy Pub Date : 2025-02-14 DOI:10.1007/s11433-024-2558-3

Deng-Wei Zhang, Pei-Qi Qin, Li-Li Zheng, Zhi-Ming Zhan, Xin-You Lü

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Abstract

We theoretically investigate chaotic dynamics in an optomechanical system composed of a whispering-gallery-mode (WGM) microresonator and a sensor. We find that tuning the optical phase using a phase shifter and modifying the coupling strength via a unidirectional waveguide (IWG) can induce chaotic motion. The underlying reason for this phenomenon is that adjusting the phase and coupling strength via the phase shifter and IWG bring the system close to an exceptional point (EP), where field localization dynamically enhances the optomechanical nonlinearity, leading to the generation of chaotic motion. In addition, due to the sensitivity of chaos to phase in the vicinity of the EP, we propose a theoretical scheme to measure the optical phase perturbations using chaos. Our work may offer an alternative approach to chaos generation with current experimental technology and provide theoretical guidance for optical signal processing and chaotic secure communication.

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带移相器的波导-光机耦合系统中的可控混沌

我们从理论上研究了由微腔和传感器组成的光力学系统的混沌动力学。我们发现使用移相器调整光相位和通过单向波导（IWG）改变耦合强度可以诱导混沌运动。这种现象的根本原因是通过移相器和IWG调节相位和耦合强度使系统接近异常点（EP），在EP点，场局部化动态增强了光力学非线性，导致混沌运动的产生。此外，由于混沌对极电位附近相位的敏感性，我们提出了一种利用混沌测量光学相位扰动的理论方案。本研究为现有实验技术下的混沌生成提供了一种替代方法，并为光信号处理和混沌保密通信提供了理论指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science China Physics, Mechanics & Astronomy PHYSICS, MULTIDISCIPLINARY-

CiteScore

10.30

自引率

6.20%

发文量

4047

审稿时长

3 months

期刊介绍： Science China Physics, Mechanics & Astronomy, an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China, and published by Science China Press, is committed to publishing high-quality, original results in both basic and applied research. Science China Physics, Mechanics & Astronomy, is published in both print and electronic forms. It is indexed by Science Citation Index. Categories of articles: Reviews summarize representative results and achievements in a particular topic or an area, comment on the current state of research, and advise on the research directions. The author’s own opinion and related discussion is requested. Research papers report on important original results in all areas of physics, mechanics and astronomy. Brief reports present short reports in a timely manner of the latest important results.