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

Authors

Fatemeh Mostafavi, The University of Texas Rio Grande Valley
Cem Yuce
Omar S. Magana-Loaiza
Henning Schomerus
Hamidreza Ramezani, The University of Texas Rio Grande ValleyFollow

Document Type

Article

Publication Date

9-2020

Abstract

We demonstrate the creation of robust localized zero-energy states that are induced into topologically trivial systems by 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.

Recommended Citation

Mostafavi, Fatemeh, Cem Yuce, Omar S. Maganã-Loaiza, Henning Schomerus, and Hamidreza Ramezani. "Robust localized zero-energy modes from locally embedded PT-symmetric defects." Physical Review Research 2, no. 3 (2020): 032057. https://doi.org/10.1103/PhysRevResearch.2.032057

Publication Title

Physical Review Research

DOI

10.1103/PhysRevResearch.2.032057