Parity-time symmetric coupled microresonators with a dispersive gain/loss
The paper reports on the coupling of Parity-Time (PT)-symmetric whispering gallery resonators with realistic material and gain/loss models. Response of the PT system is analyzed for the case of low and high material and gain dispersion, and also for two practical scenarios when the pump frequency is...
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| Format: | Article |
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Optical Society of America
2015
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| Online Access: | https://eprints.nottingham.ac.uk/28721/ |
| _version_ | 1848793630344478720 |
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| author | Phang, Sendy Vukovic, Ana Creagh, Stephen C. Benson, Trevor M. Sewell, Phillip D. Gradoni, Gabriele |
| author_facet | Phang, Sendy Vukovic, Ana Creagh, Stephen C. Benson, Trevor M. Sewell, Phillip D. Gradoni, Gabriele |
| author_sort | Phang, Sendy |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The paper reports on the coupling of Parity-Time (PT)-symmetric whispering gallery resonators with realistic material and gain/loss models. Response of the PT system is analyzed for the case of low and high material and gain dispersion, and also for two practical scenarios when the pump frequency is not aligned with the resonant frequency of the desired whispering gallery mode and when there is imbalance in the gain/loss profile. The results show that the presence of dispersion and frequency misalignment causes skewness in frequency bifurcation and significant reduction of the PT breaking point, respectively. Finally, we demonstrate a lasing mode operation which occurs due to an early PT-breaking by increasing loss in a PT system with unbalanced gain and loss. |
| first_indexed | 2025-11-14T19:03:21Z |
| format | Article |
| id | nottingham-28721 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:03:21Z |
| publishDate | 2015 |
| publisher | Optical Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-287212020-05-04T17:06:05Z https://eprints.nottingham.ac.uk/28721/ Parity-time symmetric coupled microresonators with a dispersive gain/loss Phang, Sendy Vukovic, Ana Creagh, Stephen C. Benson, Trevor M. Sewell, Phillip D. Gradoni, Gabriele The paper reports on the coupling of Parity-Time (PT)-symmetric whispering gallery resonators with realistic material and gain/loss models. Response of the PT system is analyzed for the case of low and high material and gain dispersion, and also for two practical scenarios when the pump frequency is not aligned with the resonant frequency of the desired whispering gallery mode and when there is imbalance in the gain/loss profile. The results show that the presence of dispersion and frequency misalignment causes skewness in frequency bifurcation and significant reduction of the PT breaking point, respectively. Finally, we demonstrate a lasing mode operation which occurs due to an early PT-breaking by increasing loss in a PT system with unbalanced gain and loss. Optical Society of America 2015-04-23 Article PeerReviewed Phang, Sendy, Vukovic, Ana, Creagh, Stephen C., Benson, Trevor M., Sewell, Phillip D. and Gradoni, Gabriele (2015) Parity-time symmetric coupled microresonators with a dispersive gain/loss. Optics Express, 23 (9). pp. 11493-11507. ISSN 1094-4087 https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-9-11493 doi:10.1364/OE.23.011493 doi:10.1364/OE.23.011493 |
| spellingShingle | Phang, Sendy Vukovic, Ana Creagh, Stephen C. Benson, Trevor M. Sewell, Phillip D. Gradoni, Gabriele Parity-time symmetric coupled microresonators with a dispersive gain/loss |
| title | Parity-time symmetric coupled microresonators with a dispersive gain/loss |
| title_full | Parity-time symmetric coupled microresonators with a dispersive gain/loss |
| title_fullStr | Parity-time symmetric coupled microresonators with a dispersive gain/loss |
| title_full_unstemmed | Parity-time symmetric coupled microresonators with a dispersive gain/loss |
| title_short | Parity-time symmetric coupled microresonators with a dispersive gain/loss |
| title_sort | parity-time symmetric coupled microresonators with a dispersive gain/loss |
| url | https://eprints.nottingham.ac.uk/28721/ https://eprints.nottingham.ac.uk/28721/ https://eprints.nottingham.ac.uk/28721/ |