Pseudo-parity-time symmetry in optical systems.
Pseudo-parity-time symmetry in optical systems.
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DOI：
10.1103/physrevlett.110.243902
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发表时间：
2013-02
影响因子：
8.6
通讯作者：
Xiaobing Luo;Jiahao Huang;Honghua Zhong;Xizhou Qin;Qiongtao Xie;Y. Kivshar;Chaohong Lee
中科院分区：
文献类型：
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作者：
Xiaobing Luo;Jiahao Huang;Honghua Zhong;Xizhou Qin;Qiongtao Xie;Y. Kivshar;Chaohong Lee
在增益和损耗平衡的周期调制光学系统中引入了伪宇称时间（伪PT）对称性的概念。我们证明，无论原始系统是PT对称的，我们可以操纵的PT对称性的属性，通过施加周期性调制的方式，由高频Floquet方法得到的有效系统是PT对称的。如果原始系统是非PT对称的，则有效系统中的PT对称性将导致准稳态传播，这可以与伪PT对称性相关联。我们的研究结果提供了一个很有前途的方法来操纵现实系统的PT对称性。
We introduce a novel concept of the pseudo-parity-time (pseudo-PT) symmetry in periodically modulated optical systems with balanced gain and loss. We demonstrate that whether or not the original system is PT symmetric, we can manipulate the property of the PT symmetry by applying a periodic modulation in such a way that the effective system derived by the high-frequency Floquet method is PT symmetric. If the original system is non-PT symmetric, the PT symmetry in the effective system will lead to quasistationary propagation that can be associated with the pseudo-PT symmetry. Our results provide a promising approach for manipulating the PT symmetry of realistic systems.