Skip to Main content Skip to Navigation
Journal articles

Optimal P T -symmetric switch features exceptional point

Abstract : We consider the optimization problem of least energy-cost path in open systems that are described by non-Hermitian Hamiltonians. We apply it to find the optimal gain-loss profile for a non-uniform PT-symmetric coupler performing a binary transfer function. We bring evidence that the gain-loss profile fulfilling this requirement corresponds to a non-conventional situation where light intensity is conserved at every point along the PT-symmetric system. Besides, we find that the optimal profile corresponds to a practically important case of optical switching operation achieved with minimal amount of aggregate amplification level. We show that switching architectures using such type of gain-loss profiles are much more advantageous than conventional uniform PT-symmetric couplers in terms of gain and energy. Furthermore, this type of optimal profile turns out to be robust against fabrication imperfections. This opens new prospects for functional applications of PT-symmetric devices in photonics.
Document type :
Journal articles
Complete list of metadatas

Cited literature [33 references]  Display  Hide  Download

https://hal-iogs.archives-ouvertes.fr/hal-01698855
Contributor : Marie-Laure Edwards <>
Submitted on : Thursday, February 1, 2018 - 4:57:55 PM
Last modification on : Wednesday, September 16, 2020 - 5:48:48 PM
Long-term archiving on: : Wednesday, May 2, 2018 - 7:48:19 PM

File

Lupu_et_al-2017-Scientific_Rep...
Publisher files allowed on an open archive

Identifiers

Citation

Anatole Lupu, Vladimir Konotop, Henri Benisty. Optimal P T -symmetric switch features exceptional point. Scientific Reports, Nature Publishing Group, 2017, 7 (1), pp.13299. ⟨10.1038/s41598-017-13264-9⟩. ⟨hal-01698855⟩

Share

Metrics