Exact control of parity-time symmetry in periodically modulated nonlinear optical couplers
Exact control of parity-time symmetry in periodically modulated nonlinear optical couplers
复制标题
周期性调制非线性光耦合器奇偶时间对称性的精确控制
DOI：
10.1103/physreva.94.043828
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发表时间：
2016-06
影响因子：
2.9
通讯作者：
Yu XiaoGuang
中科院分区：
文献类型：
--
作者：
Yang Baiyuan;Luo Xiaobing;Hu QiangLin;Yu XiaoGuang
我们提出了一种精确控制奇偶时间$(\mathcal{PT})$对称性的机制，该机制使用一个周期性调制的增益和损耗平衡的非线性光耦合器。结果表明，在适当选择调制参数的情况下，我们可以为描述这类非线性耦合器动力学特性的双模方程构造一系列精确解析解。这些精确解给出了明确的例子，使我们能够精确地操纵系统从非线性引起的对称性破缺到$\mathcal{PT}$对称性，从而为非线性$\mathcal{PT}$对称结构中的全光信号控制提供了一种解析方法。
We propose a mechanism for the realization of exact control of parity-time $(\mathcal{PT})$ symmetry by using a periodically modulated nonlinear optical coupler with balanced gain and loss. It is shown that for certain appropriately chosen values of the modulation parameters, we can construct a family of exact analytical solutions for the two-mode equations describing the dynamics of such nonlinear couplers. These exact solutions give explicit examples that allow us to precisely manipulate the system from nonlinearity-induced symmetry breaking to $\mathcal{PT}$ symmetry, thus providing an analytical approach to all-optical signal control in nonlinear $\mathcal{PT}$-symmetric structures.