Engineering wavefront caustics trajectories in PT-symmetric lattices

被引：2
|
作者：
Bender, Nicholas [1 ]
Ramezani, Hamidreza [2 ]
Kottos, Tsampikos
机构：
[1] Wesleyan Univ, Dept Phys, Middletown, CT 06457 USA
[2] Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr, Berkeley, CA 94720 USA
来源：
OPTICS LETTERS | 2015年 / 40卷 / 09期
基金：
美国国家科学基金会;
关键词：
PARITY-TIME SYMMETRY; AIRY BEAMS; LIGHT; LASERS;
D O I：
10.1364/OL.40.002138
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We utilize caustic theory in PT-symmetric lattices to design focusing and curved beam dynamics. We show that the gain and loss parameter in these systems provides an additional degree of freedom that allows for the design of the same caustics trajectories with different intensity distribution in the individual waveguides. Moreover we can create aberration-free focal points at any paraxial distance z(f), with anomalously large focal intensity. (C) 2015 Optical Society of America
引用
收藏
页码：2138 / 2141
页数：4
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