Observation of anti-PT-symmetry and higher-order exceptional point PT-symmetry in ternary systems for single-mode operation
Abstract Nowadays, topological parity-time (PT) and anti- parity-time (APT) symmetry systems have attracted substantial attention due to their noticeable features and specific applications. The emergence of exceptional points in these systems plays a direct role in their overall responses and causes...
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Nature Portfolio
2025-02-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-85623-w |
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| author | Milad Jahangiri Gholam-Mohammad Parsanasab Leila Hajshahvaladi |
| author_facet | Milad Jahangiri Gholam-Mohammad Parsanasab Leila Hajshahvaladi |
| author_sort | Milad Jahangiri |
| collection | DOAJ |
| description | Abstract Nowadays, topological parity-time (PT) and anti- parity-time (APT) symmetry systems have attracted substantial attention due to their noticeable features and specific applications. The emergence of exceptional points in these systems plays a direct role in their overall responses and causes them to exhibit an entirely real spectrum. Here, we propose and analyze a new approach based on the broken PT in the vicinity of a third-order exceptional point and APT symmetry that allows us to experimentally achieve a stable single-mode laser. A feasible third-order exceptional point can be synthesized by coupling three microcavities to each other. The behaviors of these lasers are evaluated in different situations according to introducing the gain and loss perturbation to the system. Our proposed microlasers and their distinct properties based on photonic exceptional points may find use in a wide variety of applications such as ultrahigh precision sensing, spectroscopy, and optical on-chip filters and lasers. |
| format | Article |
| id | doaj-art-cf56c9c042eb44628e230d66aecdc081 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-cf56c9c042eb44628e230d66aecdc0812025-02-09T12:28:43ZengNature PortfolioScientific Reports2045-23222025-02-0115111010.1038/s41598-025-85623-wObservation of anti-PT-symmetry and higher-order exceptional point PT-symmetry in ternary systems for single-mode operationMilad Jahangiri0Gholam-Mohammad Parsanasab1Leila Hajshahvaladi2Integrated Photonics Laboratory, Faculty of Electrical Engineering, Shahid Beheshti UniversityIntegrated Photonics Laboratory, Faculty of Electrical Engineering, Shahid Beheshti UniversityIntegrated Photonics Laboratory, Faculty of Electrical Engineering, Shahid Beheshti UniversityAbstract Nowadays, topological parity-time (PT) and anti- parity-time (APT) symmetry systems have attracted substantial attention due to their noticeable features and specific applications. The emergence of exceptional points in these systems plays a direct role in their overall responses and causes them to exhibit an entirely real spectrum. Here, we propose and analyze a new approach based on the broken PT in the vicinity of a third-order exceptional point and APT symmetry that allows us to experimentally achieve a stable single-mode laser. A feasible third-order exceptional point can be synthesized by coupling three microcavities to each other. The behaviors of these lasers are evaluated in different situations according to introducing the gain and loss perturbation to the system. Our proposed microlasers and their distinct properties based on photonic exceptional points may find use in a wide variety of applications such as ultrahigh precision sensing, spectroscopy, and optical on-chip filters and lasers.https://doi.org/10.1038/s41598-025-85623-wAnti-parity-time symmetryExceptional pointSingle-mode laserQuantum photonics |
| spellingShingle | Milad Jahangiri Gholam-Mohammad Parsanasab Leila Hajshahvaladi Observation of anti-PT-symmetry and higher-order exceptional point PT-symmetry in ternary systems for single-mode operation Scientific Reports Anti-parity-time symmetry Exceptional point Single-mode laser Quantum photonics |
| title | Observation of anti-PT-symmetry and higher-order exceptional point PT-symmetry in ternary systems for single-mode operation |
| title_full | Observation of anti-PT-symmetry and higher-order exceptional point PT-symmetry in ternary systems for single-mode operation |
| title_fullStr | Observation of anti-PT-symmetry and higher-order exceptional point PT-symmetry in ternary systems for single-mode operation |
| title_full_unstemmed | Observation of anti-PT-symmetry and higher-order exceptional point PT-symmetry in ternary systems for single-mode operation |
| title_short | Observation of anti-PT-symmetry and higher-order exceptional point PT-symmetry in ternary systems for single-mode operation |
| title_sort | observation of anti pt symmetry and higher order exceptional point pt symmetry in ternary systems for single mode operation |
| topic | Anti-parity-time symmetry Exceptional point Single-mode laser Quantum photonics |
| url | https://doi.org/10.1038/s41598-025-85623-w |
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