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  • PhysRevResearch.2.032057

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Robust localized zero-energy modes from locally embedded PT-symmetric defects

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Article number032057(R)
<mark>Journal publication date</mark>1/09/2020
<mark>Journal</mark>Physical Review Research
Volume2
Number of pages7
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We demonstrate the creation of robust localized zero-energy states that are induced into topologically trivial systems by the insertion of a PT-symmetric defect with local gain and loss. A pair of robust localized states induced by the defect turns into zero-energy modes when the gain-loss contrast exceeds a threshold, at which the defect states encounter an exceptional point. Our approach can be used to obtain robust lasing or perfectly absorbing modes in any part of the system.