Title

Observation Of Defect States In Pt-Symmetric Optical Lattices

Abstract

We provide the first experimental demonstration of defect states in parity-time (PT) symmetric mesh-periodic potentials. Our results indicate that these localized modes can undergo an abrupt phase transition in spite of the fact that they remain localized in a PT-symmetric periodic environment. Even more intriguing is the possibility of observing a linearly growing radiation emission from such defects provided their eigenvalue is associated with an exceptional point that resides within the continuum part of the spectrum. Localized complex modes existing outside the band-gap regions are also reported along with their evolution dynamics. © 2013 American Physical Society.

Publication Date

5-29-2013

Publication Title

Physical Review Letters

Volume

110

Issue

22

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.110.223902

Socpus ID

84878356533 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84878356533

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