Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/64579
Title: Anomalous light scattering by topological PT-symmetric particle arrays
Authors: Ling, CW
Choi, KH
Mok, TC
Zhang, ZQ
Fung, KH 
Issue Date: 2016
Publisher: Springer Nature
Source: Scientific reports, 2016, 6, 38049, p. 1-12 How to cite?
Journal: Scientific reports 
Abstract: Robust topological edge modes may evolve into complex-frequency modes when a physical system becomes non-Hermitian. We show that, while having negligible forward optical extinction cross section, a conjugate pair of such complex topological edge modes in a non-Hermitian PT-symmetric system can give rise to an anomalous sideway scattering when they are simultaneously excited by a plane wave. We propose a realization of such scattering state in a linear array of subwavelength resonators coated with gain media. The prediction is based on an analytical two-band model and verified by rigorous numerical simulation using multiple-multipole scattering theory. The result suggests an extreme situation where leakage of classical information is unnoticeable to the transmitter and the receiver when such a PT-symmetric unit is inserted into the communication channel.
URI: http://hdl.handle.net/10397/64579
ISSN: 2045-2322 (online)
DOI: 10.1038/srep38049
Rights: © The Author(s) 2016
This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
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