Accessing the exceptional points of parity-time symmetric acoustics

Parity-time (PT) symmetric systems experience phase transition between PT exact and broken phases at exceptional point. These PT phase transitions contribute significantly to the design of single mode lasers, coherent perfect absorbers, isolators, and diodes. However, such exceptional points are ext...

Full description

Bibliographic Details
Main Authors:	Shi, Chengzhi, Dubois, Marc, Chen, Yun, Cheng, Lei, Ramezani, Hamidreza, Wang, Yuan, Zhang, Xiang
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4820938/

id	pubmed-4820938
recordtype	oai_dc
spelling	pubmed-48209382016-04-17 Accessing the exceptional points of parity-time symmetric acoustics Shi, Chengzhi Dubois, Marc Chen, Yun Cheng, Lei Ramezani, Hamidreza Wang, Yuan Zhang, Xiang Article Parity-time (PT) symmetric systems experience phase transition between PT exact and broken phases at exceptional point. These PT phase transitions contribute significantly to the design of single mode lasers, coherent perfect absorbers, isolators, and diodes. However, such exceptional points are extremely difficult to access in practice because of the dispersive behaviour of most loss and gain materials required in PT symmetric systems. Here we introduce a method to systematically tame these exceptional points and control PT phases. Our experimental demonstration hinges on an active acoustic element that realizes a complex-valued potential and simultaneously controls the multiple interference in the structure. The manipulation of exceptional points offers new routes to broaden applications for PT symmetric physics in acoustics, optics, microwaves and electronics, which are essential for sensing, communication and imaging. Nature Publishing Group 2016-03-30 /pmc/articles/PMC4820938/ /pubmed/27025443 http://dx.doi.org/10.1038/ncomms11110 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ 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/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Shi, Chengzhi Dubois, Marc Chen, Yun Cheng, Lei Ramezani, Hamidreza Wang, Yuan Zhang, Xiang
spellingShingle	Shi, Chengzhi Dubois, Marc Chen, Yun Cheng, Lei Ramezani, Hamidreza Wang, Yuan Zhang, Xiang Accessing the exceptional points of parity-time symmetric acoustics
author_facet	Shi, Chengzhi Dubois, Marc Chen, Yun Cheng, Lei Ramezani, Hamidreza Wang, Yuan Zhang, Xiang
author_sort	Shi, Chengzhi
title	Accessing the exceptional points of parity-time symmetric acoustics
title_short	Accessing the exceptional points of parity-time symmetric acoustics
title_full	Accessing the exceptional points of parity-time symmetric acoustics
title_fullStr	Accessing the exceptional points of parity-time symmetric acoustics
title_full_unstemmed	Accessing the exceptional points of parity-time symmetric acoustics
title_sort	accessing the exceptional points of parity-time symmetric acoustics
description	Parity-time (PT) symmetric systems experience phase transition between PT exact and broken phases at exceptional point. These PT phase transitions contribute significantly to the design of single mode lasers, coherent perfect absorbers, isolators, and diodes. However, such exceptional points are extremely difficult to access in practice because of the dispersive behaviour of most loss and gain materials required in PT symmetric systems. Here we introduce a method to systematically tame these exceptional points and control PT phases. Our experimental demonstration hinges on an active acoustic element that realizes a complex-valued potential and simultaneously controls the multiple interference in the structure. The manipulation of exceptional points offers new routes to broaden applications for PT symmetric physics in acoustics, optics, microwaves and electronics, which are essential for sensing, communication and imaging.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4820938/
_version_	1613562315996659712

Accessing the exceptional points of parity-time symmetric acoustics

Similar Items