PT-symmetry in honeycomb photonic lattices

被引：240
|
作者：
Szameit, Alexander [1 ]
Rechtsman, Mikael C.
Bahat-Treidel, Omri
Segev, Mordechai
机构：
[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
来源：
PHYSICAL REVIEW A | 2011年 / 84卷 / 02期
基金：
以色列科学基金会; 欧洲研究理事会;
关键词：
REAL; EIGENVALUES;
D O I：
10.1103/PhysRevA.84.021806
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We apply gain and loss to honeycomb photonic lattices and show that the dispersion relation is identical to tachyons-particles with imaginary mass that travel faster than the speed of light. This is accompanied by PT-symmetry breaking in this structure. We further show that the PT-symmetry can be restored by deforming the lattice.
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页数：5
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