Simultaneous multi-frequency topological edge modes between one-dimensional photonic crystals

被引：65
|
作者：
Choi, Ka Hei [1 ]
Ling, C. W. [1 ]
Lee, K. F. [1 ]
Tsang, Y. H. [1 ]
Fung, Kin Hung [1 ]
机构：
[1] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China
来源：
OPTICS LETTERS | 2016年 / 41卷 / 07期
关键词：
ZAK PHASE; ENHANCEMENT; STATES; BANDS;
D O I：
10.1364/OL.41.001644
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We show theoretically that, in the limit of weak dispersion, one-dimensional binary centrosymmetric photonic crystals can support topological edge modes in all photonic bandgaps. By analyzing their bulk band topology, these "harmonic" topological edge modes can be designed in a way that they exist at all photonic bandgaps opened at the center of the Brillouin zone, at all gaps opened at the zone boundaries, or both. The results may suggest a new approach to achieve robust multi-frequency coupled modes for applications in nonlinear photonics, such as frequency upconversion. (C) 2016 Optical Society of America
引用
收藏
页码：1644 / 1647
页数：4
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