Observation of a Topological Transition in the Bulk of a Non-Hermitian System

被引：619

作者：

Zeuner, Julia M. ^{[1
]}

Rechtsman, Mikael C. ^{[2
]}

Plotnik, Yonatan ^{[3
]}

Lumer, Yaakov ^{[3
]}

Nolte, Stefan ^{[1
]}

Rudner, Mark S. ^{[4
]}

Segev, Mordechai ^{[3
]}

Szameit, Alexander ^{[1
]}

机构：

[1] Univ Jena, Inst Appl Phys, D-07743 Jena, Germany

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[3] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[4] Niels Bohr Inst, Niels Bohr Int Acad, DK-2100 Copenhagen, Denmark

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 04期

基金：

以色列科学基金会;

关键词：

EDGE STATES; ZAK PHASE; INSULATOR; SOLITONS; PHOTONS;

D O I：

10.1103/PhysRevLett.115.040402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first experimental observation of a topological transition in a non-Hermitian system. In contrast to standard methods for examining topological properties, which involve probing edge (or surface) states, we monitor the topological transition by employing bulk dynamics only. The system is composed of a lattice of evanescently coupled optical waveguides, and non-Hermitian behavior is engineered by inducing bending loss by spatially "wiggling" every second waveguide.

引用

页数：5

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