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Non-Hermitian defect states from lifetime differences

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Non-Hermitian defect states from lifetime differences. / Bosch, Marti; Malzard, Simon; Hentschel, Martina et al.
In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 100, 063801, 02.12.2019.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Bosch, M, Malzard, S, Hentschel, M & Schomerus, H 2019, 'Non-Hermitian defect states from lifetime differences', Physical Review A - Atomic, Molecular, and Optical Physics, vol. 100, 063801. https://doi.org/10.1103/PhysRevA.100.063801

APA

Bosch, M., Malzard, S., Hentschel, M., & Schomerus, H. (2019). Non-Hermitian defect states from lifetime differences. Physical Review A - Atomic, Molecular, and Optical Physics, 100, Article 063801. https://doi.org/10.1103/PhysRevA.100.063801

Vancouver

Bosch M, Malzard S, Hentschel M, Schomerus H. Non-Hermitian defect states from lifetime differences. Physical Review A - Atomic, Molecular, and Optical Physics. 2019 Dec 2;100:063801. doi: 10.1103/PhysRevA.100.063801

Author

Bosch, Marti ; Malzard, Simon ; Hentschel, Martina et al. / Non-Hermitian defect states from lifetime differences. In: Physical Review A - Atomic, Molecular, and Optical Physics. 2019 ; Vol. 100.

Bibtex

@article{32c6cb5eff15487496991313d10e36b7,
title = "Non-Hermitian defect states from lifetime differences",
abstract = "Non-Hermitian systems provide new avenues to create topological defect states. An unresolved general question is how much the formation of these states depends on asymmetric backscattering, be it nonreciprocal as in the non-Hermitian skin effect or reciprocal as encountered between the internal states of asymmetric microresonators. Here, we demonstrate in a concrete, practically accessible setting of a lossy coupled-resonator optical waveguide that non-Hermitian defect states can exist in open optical systems due to lifetime differences, without the need for asymmetric backscattering within or between the individual resonators. We apply our findings to a finite system of coupled circular resonators perturbed by nanoparticles, following the concept of creating an interface by inverting the position of the nanoparticles in half of the chain. We compare a coupled-mode tight-binding approximation to full-wave numerical simulations, showing that spectrally isolated defect states can indeed be implemented in this simple non-Hermitian photonic device.",
author = "Marti Bosch and Simon Malzard and Martina Hentschel and Henning Schomerus",
note = "{\textcopyright} 2019 American Physical Society",
year = "2019",
month = dec,
day = "2",
doi = "10.1103/PhysRevA.100.063801",
language = "English",
volume = "100",
journal = "Physical Review A - Atomic, Molecular, and Optical Physics",
issn = "2469-9926",
publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Non-Hermitian defect states from lifetime differences

AU - Bosch, Marti

AU - Malzard, Simon

AU - Hentschel, Martina

AU - Schomerus, Henning

N1 - © 2019 American Physical Society

PY - 2019/12/2

Y1 - 2019/12/2

N2 - Non-Hermitian systems provide new avenues to create topological defect states. An unresolved general question is how much the formation of these states depends on asymmetric backscattering, be it nonreciprocal as in the non-Hermitian skin effect or reciprocal as encountered between the internal states of asymmetric microresonators. Here, we demonstrate in a concrete, practically accessible setting of a lossy coupled-resonator optical waveguide that non-Hermitian defect states can exist in open optical systems due to lifetime differences, without the need for asymmetric backscattering within or between the individual resonators. We apply our findings to a finite system of coupled circular resonators perturbed by nanoparticles, following the concept of creating an interface by inverting the position of the nanoparticles in half of the chain. We compare a coupled-mode tight-binding approximation to full-wave numerical simulations, showing that spectrally isolated defect states can indeed be implemented in this simple non-Hermitian photonic device.

AB - Non-Hermitian systems provide new avenues to create topological defect states. An unresolved general question is how much the formation of these states depends on asymmetric backscattering, be it nonreciprocal as in the non-Hermitian skin effect or reciprocal as encountered between the internal states of asymmetric microresonators. Here, we demonstrate in a concrete, practically accessible setting of a lossy coupled-resonator optical waveguide that non-Hermitian defect states can exist in open optical systems due to lifetime differences, without the need for asymmetric backscattering within or between the individual resonators. We apply our findings to a finite system of coupled circular resonators perturbed by nanoparticles, following the concept of creating an interface by inverting the position of the nanoparticles in half of the chain. We compare a coupled-mode tight-binding approximation to full-wave numerical simulations, showing that spectrally isolated defect states can indeed be implemented in this simple non-Hermitian photonic device.

U2 - 10.1103/PhysRevA.100.063801

DO - 10.1103/PhysRevA.100.063801

M3 - Journal article

VL - 100

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 2469-9926

M1 - 063801

ER -