PT phase control in circular multi-core fibers

被引：27
|
作者：
Longhi, Stefano [1 ,2 ]
机构：
[1] Politecn Milan, Dipartimento Fis, Piazza L da Vinci 32, I-20133 Milan, Italy
[2] CNR, Ist Foton & Nanotecnol, Piazza L da Vinci 32, I-20133 Milan, Italy
来源：
OPTICS LETTERS | 2016年 / 41卷 / 09期
关键词：
PARITY-TIME SYMMETRY;
D O I：
10.1364/OL.41.001897
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We consider light dynamics in a circular multi-core fiber with balanced gain and loss core distribution, and show that transition from unbroken to broken PT phases can be conveniently controlled by geometric twist of the fiber. The twist introduces Peierls phases in the coupling constants and, thus, acts as an artificial gauge field. As an application, we discuss twist-induced tuning of optical transmission in a six-core fiber with one lossy core. (C) 2016 Optical Society of America
引用
收藏
页码：1897 / 1900
页数：4
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