Non-Hermitian trimers: PT-symmetry versus pseudo-Hermiticity

Sergey V. Suchkov, Fernande Fotsa-Ngaffo, Aurelien Kenfack-Jiotsa, Arnaud D. Tikeng, Timoleon C. Kofane, Yuri S. Kivshar, Andrey A. Sukhorukov

    Research output: Contribution to journalArticlepeer-review

    34 Citations (Scopus)

    Abstract

    We study a structure composed of three coupled waveguides with gain and loss, a non-Hermitian trimer. We demonstrate that the mode spectrum can be entirely real if the waveguides are placed in a special order and at certain distances between each other. Such structures generally lack a spatial symmetry, in contrast to parity-time symmetric trimers which are known to feature a real spectrum. We also determine a threshold for wave amplification and analyse the scattering properties of such non-conservative systems embedded into a chain of conservative waveguides.

    Original languageEnglish
    Article number065005
    JournalNew Journal of Physics
    Volume18
    Issue number6
    DOIs
    Publication statusPublished - Jun 2016

    Fingerprint

    Dive into the research topics of 'Non-Hermitian trimers: PT-symmetry versus pseudo-Hermiticity'. Together they form a unique fingerprint.

    Cite this