| Download | - View final version: Parity-time and anti-parity-time states of Bragg gratings and their representation in spherical coordinates (PDF, 3.1 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1364/OE.542182 |
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| Author | Search for: Hao, Tianyi1ORCID identifier: https://orcid.org/0000-0002-7760-9151; Search for: Cheben, Pavel1, 2ORCID identifier: https://orcid.org/0000-0003-4232-9130; Search for: Schmid, Jens H.2ORCID identifier: https://orcid.org/0000-0003-3508-7428; Search for: Berini, Pierre1ORCID identifier: https://orcid.org/0000-0002-6795-7275 |
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| Affiliation | - University of Ottawa
- National Research Council Canada. Quantum and Nanotechnologies
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| Funder | Search for: National Research Council Canada; Search for: Natural Sciences and Engineering Research Council of Canada |
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| Format | Text, Article |
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| Abstract | Parity-time (PT) symmetry and anti-PT symmetry are two interesting types of non-Hermitian Hamiltonian systems. We propose a spherical graphical representation to concisely capture the (anti-)PT symmetry design space of Bragg gratings having phase-shifted real and imaginary refractive index perturbations. A general Bragg grating perturbation function is used such that designs can be arbitrarily changed to reach different (anti-)PT symmetric states. Special cases having simplified perturbations are explored, consisting of real index only, imaginary index only, and perturbations reaching (anti-)PT symmetry unbroken, broken, and exceptional point states. The evolution of the PT states of Bragg gratings and their interesting and unique properties lead to potential applications in sensing and lasing. |
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| Publication date | 2024-12-03 |
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| Publisher | Optica Publishing Group |
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| Copyright statement | - © 2024 Optica Publishing Group
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | f71b45fd-aca0-4521-9322-83048b2843a3 |
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| Record created | 2026-01-23 |
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| Record modified | 2026-02-25 |
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