Exceptional-point dynamics in photonic honeycomb lattices with PT symmetry

被引：85

作者：

Ramezani, Hamidreza ^{[1
]}

Kottos, Tsampikos ^{[1
,2
]}

Kovanis, Vassilios ^{[3
]}

Christodoulides, Demetrios N. ^{[4
]}

机构：

[1] Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA

[2] MPI Dynam & Self Org, D-37073 Gottingen, Germany

[3] USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA

[4] Univ Cent Florida, Coll Opt Photon CREOL, Orlando, FL 32816 USA

来源：

PHYSICAL REVIEW A | 2012年 / 85卷 / 01期

基金：

美国国家科学基金会;

关键词：

SPONTANEOUS EMISSION; CONICAL DIFFRACTION; PSEUDO-HERMITICITY;

D O I：

10.1103/PhysRevA.85.013818

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We theoretically investigate the flow of electromagnetic waves in complex honeycomb photonic lattices with local PT symmetries. Such PT structure is introduced via a judicious arrangement of gain and loss across the honeycomb lattice, characterized by a gain and loss parameter gamma. We found a class of conical diffraction phenomena where the formed cone is brighter and travels along the lattice with a transverse speed proportional to root gamma.

引用

页数：6

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