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  Observation of Defect States in PT-Symmetric Optical Lattices

Regensburger, A., Miri, M.-A., Bersch, C., Naeger, J., Onishchukov, G., Christodoulides, D. N., et al. (2013). Observation of Defect States in PT-Symmetric Optical Lattices. PHYSICAL REVIEW LETTERS, 110(22): UNSP 223902. doi:10.1103/PhysRevLett.110.223902.

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 Creators:
Regensburger, Alois1, Author           
Miri, Mohammad-Ali2, Author
Bersch, Christoph3, Author           
Naeger, Jakob2, Author
Onishchukov, Georgy3, Author           
Christodoulides, Demetrios N.2, Author
Peschel, Ulf1, Author           
Affiliations:
1Nonlinear Optics and Nanophotonics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364701              
2external, ou_persistent22              
3Optical Communication, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364703              

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Free keywords: NON-HERMITIAN HAMILTONIANS; REAL; SPECTRA; MODES; LASERPhysics;
 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.

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Language(s): eng - English
 Dates: 2013
 Publication Status: Published online
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

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Title: PHYSICAL REVIEW LETTERS
Source Genre: Journal
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Publ. Info: ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA : AMER PHYSICAL SOC
Pages: - Volume / Issue: 110 (22) Sequence Number: UNSP 223902 Start / End Page: - Identifier: ISSN: 0031-9007