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Defect States Emerging from a Non-Hermitian Flatband of Photonic Zero Modes
Qi, Bingkun1,2; Zhang, Lingxuan1,3; Ge, Li1,2
作者部门瞬态光学技术国家重点实验室
2018-02-27
发表期刊PHYSICAL REVIEW LETTERS
ISSN0031-9007
卷号120期号:9
产权排序3
摘要

We show the existence of a flatband consisting of photonic zero modes in a gain and loss modulated lattice system as a result of the underlying non-Hermitian particle-hole symmetry. This general finding explains the previous observation in parity-time symmetric systems where non-Hermitian particle-hole symmetry is hidden. We further discuss the defect states in these systems, whose emergence can be viewed as an unconventional alignment of a pseudospin under the influence of a complex-valued pseudomagnetic field. These defect states also behave as a chain with two types of links, one rigid in a unit cell and one soft between unit cells, as the defect states become increasingly localized with the gain and loss strength.

 

学科领域Physics, Multidisciplinary
DOI10.1103/PhysRevLett.120.093901
收录类别SCI ; EI
语种英语
WOS记录号WOS:000426173800004
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.opt.ac.cn/handle/181661/30753
专题瞬态光学技术国家重点实验室
通讯作者Ge, Li
作者单位1.CUNY Coll Staten Isl, Dept Engn Sci & Phys, Staten Isl, NY 10314 USA;
2.CUNY, Grad Ctr, New York, NY 10016 USA;
3.Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714
Qi, Bingkun,Zhang, Lingxuan,Ge, Li. Defect States Emerging from a Non-Hermitian Flatband of Photonic Zero Modes[J]. PHYSICAL REVIEW LETTERS,2018,120(9).
APA Qi, Bingkun,Zhang, Lingxuan,&Ge, Li.(2018).Defect States Emerging from a Non-Hermitian Flatband of Photonic Zero Modes.PHYSICAL REVIEW LETTERS,120(9).
MLA Qi, Bingkun,et al."Defect States Emerging from a Non-Hermitian Flatband of Photonic Zero Modes".PHYSICAL REVIEW LETTERS 120.9(2018).
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