Enabling infinite Q factors in absorbing optical systems
Resonant optical structures have widespread applications in science and technology. However, their quality (Q) factors can be significantly deteriorated, if some of their parts exhibit optical absorption. Here, we show that by coupling a lossy mode of such a structure to two independent lossless mod...
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-08-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2023-0281 |
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| author | Kolkowski Radoslaw Shevchenko Andriy |
| author_facet | Kolkowski Radoslaw Shevchenko Andriy |
| author_sort | Kolkowski Radoslaw |
| collection | DOAJ |
| description | Resonant optical structures have widespread applications in science and technology. However, their quality (Q) factors can be significantly deteriorated, if some of their parts exhibit optical absorption. Here, we show that by coupling a lossy mode of such a structure to two independent lossless modes, one can create a nonradiating and absorption-free bound state in the continuum (BIC). The Q factor of such a BIC is theoretically unlimited despite interaction with an absorbing structure. We use this mechanism to design a plasmonic metasurface with Q factors that are close to 107 in the visible spectral range. The proposed mechanism is general and can be used to engineer ultrahigh-Q resonances in various systems containing absorbing structures. |
| format | Article |
| id | doaj-art-de3b5a00bb8e4a279c5dc4ca3a8e13f9 |
| institution | Kabale University |
| issn | 2192-8614 |
| language | English |
| publishDate | 2023-08-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-de3b5a00bb8e4a279c5dc4ca3a8e13f92024-11-25T11:19:10ZengDe GruyterNanophotonics2192-86142023-08-0112173443345410.1515/nanoph-2023-0281Enabling infinite Q factors in absorbing optical systemsKolkowski Radoslaw0Shevchenko Andriy1Department of Applied Physics, Aalto University, P.O.Box 13500, Aalto FI 00076, Espoo, FinlandDepartment of Applied Physics, Aalto University, P.O.Box 13500, Aalto FI 00076, Espoo, FinlandResonant optical structures have widespread applications in science and technology. However, their quality (Q) factors can be significantly deteriorated, if some of their parts exhibit optical absorption. Here, we show that by coupling a lossy mode of such a structure to two independent lossless modes, one can create a nonradiating and absorption-free bound state in the continuum (BIC). The Q factor of such a BIC is theoretically unlimited despite interaction with an absorbing structure. We use this mechanism to design a plasmonic metasurface with Q factors that are close to 107 in the visible spectral range. The proposed mechanism is general and can be used to engineer ultrahigh-Q resonances in various systems containing absorbing structures.https://doi.org/10.1515/nanoph-2023-0281bound state in the continuumoptical absorptionresonant metasurface |
| spellingShingle | Kolkowski Radoslaw Shevchenko Andriy Enabling infinite Q factors in absorbing optical systems Nanophotonics bound state in the continuum optical absorption resonant metasurface |
| title | Enabling infinite Q factors in absorbing optical systems |
| title_full | Enabling infinite Q factors in absorbing optical systems |
| title_fullStr | Enabling infinite Q factors in absorbing optical systems |
| title_full_unstemmed | Enabling infinite Q factors in absorbing optical systems |
| title_short | Enabling infinite Q factors in absorbing optical systems |
| title_sort | enabling infinite q factors in absorbing optical systems |
| topic | bound state in the continuum optical absorption resonant metasurface |
| url | https://doi.org/10.1515/nanoph-2023-0281 |
| work_keys_str_mv | AT kolkowskiradoslaw enablinginfiniteqfactorsinabsorbingopticalsystems AT shevchenkoandriy enablinginfiniteqfactorsinabsorbingopticalsystems |