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. 2009 Aug 28;103(9):093902.
doi: 10.1103/PhysRevLett.103.093902. Epub 2009 Aug 27.

Observation of PT-symmetry breaking in complex optical potentials

A Guo  1 , G J Salamo, D Duchesne, R Morandotti, M Volatier-Ravat, V Aimez, G A Siviloglou, D N Christodoulides
Affiliations

Observation of PT-symmetry breaking in complex optical potentials

A Guo et al. Phys Rev Lett. .

Abstract

In 1998, Bender and Boettcher found that a wide class of Hamiltonians, even though non-Hermitian, can still exhibit entirely real spectra provided that they obey parity-time requirements or PT symmetry. Here we demonstrate experimentally passive PT-symmetry breaking within the realm of optics. This phase transition leads to a loss induced optical transparency in specially designed pseudo-Hermitian guiding potentials.

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