Publication:
Observation of parity-time symmetry in optics

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cris.virtual.departmentExperimentalphysik und Materialwissenschaften
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cris.virtual.departmentbrowseExperimentalphysik und Materialwissenschaften
cris.virtual.departmentbrowseExperimentalphysik und Materialwissenschaften
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dc.contributor.authorRüter, Christian E.
dc.contributor.authorMakris, Konstantinos G.
dc.contributor.authorEl-Ganainy, Ramy
dc.contributor.authorChristodoulides, Demetrios N.
dc.contributor.authorSegev, Mordechai
dc.contributor.authorKip, Detlef
dc.date.issued2010-01
dc.description.abstractOne of the fundamental axioms of quantum mechanics is associated with the Hermiticity of physical observables. In the case of the Hamiltonian operator, this requirement not only implies real eigenenergies but also guarantees probability conservation. Interestingly, a wide class of non-Hermitian Hamiltonians can still show entirely real spectra. Among these are Hamiltonians respecting parity-time (PT) symmetry. Even though the Hermiticity of quantum observables was never in doubt, such concepts have motivated discussions on several fronts in physics, including quantum field theories, non-Hermitian Anderson models and open quantum systems, to mention a few. Although the impact of PT symmetry in these fields is still debated, it has been recently realized that optics can provide a fertile ground where PT-related notions can be implemented and experimentally investigated. In this letter we report the first observation of the behaviour of a PT optical coupled system that judiciously involves a complex index potential. We observe both spontaneous PT symmetry breaking and power oscillations violating left-right symmetry. Our results may pave the way towards a new class of PT-synthetic materials with intriguing and unexpected properties that rely on non-reciprocal light propagation and tailored transverse energy flow. © 2010 Macmillan Publishers Limited. All rights reserved.
dc.description.versionNA
dc.identifier.doi10.1038/nphys1515
dc.identifier.issn1745-2473
dc.identifier.issn1745-2481
dc.identifier.scopus2-s2.0-77950489224
dc.identifier.urihttps://openhsu.ub.hsu-hh.de/handle/10.24405/13990
dc.language.isoen
dc.publisherNature Publishing Group
dc.relation.journalNature Physics
dc.relation.orgunitExperimentalphysik und Materialwissenschaften
dc.rights.accessRightsmetadata only access
dc.titleObservation of parity-time symmetry in optics
dc.typeResearch article
dcterms.bibliographicCitation.originalpublisherplaceBasingstoke
dspace.entity.typePublication
hsu.uniBibliography
oaire.citation.endPage195
oaire.citation.startPage192
oaire.citation.volume6
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