Localized single frequency lasing states in a finite parity-time symmetric resonator chain
In this paper a practical case of a finite periodic Parity Time chain made of resonant dielectric cylinders is considered. The paper analyzes a more general case where PT symmetry is achieved by modulating both the real and imaginary part of the material refractive index along the resonator chain. T...
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Nature Publishing Group
2016
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| Online Access: | https://eprints.nottingham.ac.uk/31610/ |
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| author | Phang, Sendy Vukovic, Ana Creagh, Stephen C. Sewell, Phillip Gradoni, Gabriele Benson, Trevor M. |
| author_facet | Phang, Sendy Vukovic, Ana Creagh, Stephen C. Sewell, Phillip Gradoni, Gabriele Benson, Trevor M. |
| author_sort | Phang, Sendy |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | In this paper a practical case of a finite periodic Parity Time chain made of resonant dielectric cylinders is considered. The paper analyzes a more general case where PT symmetry is achieved by modulating both the real and imaginary part of the material refractive index along the resonator chain. The band-structure of the finite periodic PT resonator chains is compared to infinite chains in order to understand the complex interdependence of the Bloch phase and the amount of the gain/loss in the system that causes the PT symmetry to break. The results show that the type of the modulation along the unit cell can significantly affect the position of the threshold point of the PT system. In all cases the lowest threshold is achieved near the end of the Brillouin zone. In the case of finite PT-chains, and for a particular type of modulation, early PT symmetry breaking is observed and shown to be caused by the presence of termination states localized at the edges of the finite chain resulting in localized lasing and dissipative modes at each end of the chain. |
| first_indexed | 2025-11-14T19:12:58Z |
| format | Article |
| id | nottingham-31610 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:12:58Z |
| publishDate | 2016 |
| publisher | Nature Publishing Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-316102020-05-04T17:37:54Z https://eprints.nottingham.ac.uk/31610/ Localized single frequency lasing states in a finite parity-time symmetric resonator chain Phang, Sendy Vukovic, Ana Creagh, Stephen C. Sewell, Phillip Gradoni, Gabriele Benson, Trevor M. In this paper a practical case of a finite periodic Parity Time chain made of resonant dielectric cylinders is considered. The paper analyzes a more general case where PT symmetry is achieved by modulating both the real and imaginary part of the material refractive index along the resonator chain. The band-structure of the finite periodic PT resonator chains is compared to infinite chains in order to understand the complex interdependence of the Bloch phase and the amount of the gain/loss in the system that causes the PT symmetry to break. The results show that the type of the modulation along the unit cell can significantly affect the position of the threshold point of the PT system. In all cases the lowest threshold is achieved near the end of the Brillouin zone. In the case of finite PT-chains, and for a particular type of modulation, early PT symmetry breaking is observed and shown to be caused by the presence of termination states localized at the edges of the finite chain resulting in localized lasing and dissipative modes at each end of the chain. Nature Publishing Group 2016-02-05 Article PeerReviewed Phang, Sendy, Vukovic, Ana, Creagh, Stephen C., Sewell, Phillip, Gradoni, Gabriele and Benson, Trevor M. (2016) Localized single frequency lasing states in a finite parity-time symmetric resonator chain. Scientific Reports, 6 . e20499/1-e20499/12. ISSN 2045-2322 Metamaterials Microresonators Optoelectronic devices and components http://www.nature.com/articles/srep20499 doi:10.1038/srep20499 doi:10.1038/srep20499 |
| spellingShingle | Metamaterials Microresonators Optoelectronic devices and components Phang, Sendy Vukovic, Ana Creagh, Stephen C. Sewell, Phillip Gradoni, Gabriele Benson, Trevor M. Localized single frequency lasing states in a finite parity-time symmetric resonator chain |
| title | Localized single frequency lasing states in a finite parity-time symmetric resonator chain |
| title_full | Localized single frequency lasing states in a finite parity-time symmetric resonator chain |
| title_fullStr | Localized single frequency lasing states in a finite parity-time symmetric resonator chain |
| title_full_unstemmed | Localized single frequency lasing states in a finite parity-time symmetric resonator chain |
| title_short | Localized single frequency lasing states in a finite parity-time symmetric resonator chain |
| title_sort | localized single frequency lasing states in a finite parity-time symmetric resonator chain |
| topic | Metamaterials Microresonators Optoelectronic devices and components |
| url | https://eprints.nottingham.ac.uk/31610/ https://eprints.nottingham.ac.uk/31610/ https://eprints.nottingham.ac.uk/31610/ |