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PreprintarXiv licencearXiv

Controlling exceptional points of layered non-Hermitian structures with magnetic field

  • Milena Ramanovich
  • Denis Novitsky
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Abstract

Exceptional points are the characteristic features of non-Hermitian systems providing numerous applications in optics, acoustics, electronics, etc. We show that exceptional points can be controlled with the external magnetic field by considering the archetypal three-layered 𝒫𝒯-symmetric photonic structure including a magneto-optic material between the loss and gain layers. Application of the magnetic field makes the system anisotropic with the polarization-sensitive reflection and transmission properties. As a result, the magnetic field can stimulate 𝒫𝒯-symmetry breaking and mode exchange at realistic values of system parameters. Moreover, we suggest that the proposed scheme can be also used for magnetic-perturbation sensing with an easily adaptable level of desired field strength. Our results contain a valuable evidence for the usefulness of anisotropic (including magnetic) materials for tunable non-Hermitian photonics.

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Cite

BibTeXRIS
BibTeX
@misc{ramanovich2026controlling,
  title = {{Controlling exceptional points of layered non-Hermitian structures with magnetic field}},
  author = {Milena Ramanovich and Denis Novitsky},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.27902},
  eprint = {2610.27902},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.27902},
}
RIS
TY  - UNPB
TI  - Controlling exceptional points of layered non-Hermitian structures with magnetic field
AU  - Milena Ramanovich
AU  - Denis Novitsky
PY  - 2026
DA  - 2026/10/20
PB  - arXiv
DO  - 10.48550/arxiv.2610.27902
UR  - https://arxiv.org/abs/2610.27902
AB  - Exceptional points are the characteristic features of non-Hermitian systems providing numerous applications in optics, acoustics, electronics, etc. We show that exceptional points can be controlled with the external magnetic field by considering the archetypal three-layered 𝒫𝒯-symmetric photonic structure including a magneto-optic material between the loss and gain layers. Application of the magnetic field makes the system anisotropic with the polarization-sensitive reflection and transmission properties. As a result, the magnetic field can stimulate 𝒫𝒯-symmetry breaking and mode exchange at realistic values of system parameters. Moreover, we suggest that the proposed scheme can be also used for magnetic-perturbation sensing with an easily adaptable level of desired field strength. Our results contain a valuable evidence for the usefulness of anisotropic (including magnetic) materials for tunable non-Hermitian photonics.
ER  -