A large-scale single-mode array laser based on a topological edge mode
Topological lasers have been intensively investigated as a strong candidate for robust single-mode lasers. A typical topological laser employs a single-mode topological edge state, which appears deterministically in a designed topological bandgap and exhibits robustness to disorder. These properties...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-02-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2021-0608 |
| _version_ | 1797947997487628288 |
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| author | Ishida Natsuko Ota Yasutomo Lin Wenbo Byrnes Tim Arakawa Yasuhiko Iwamoto Satoshi |
| author_facet | Ishida Natsuko Ota Yasutomo Lin Wenbo Byrnes Tim Arakawa Yasuhiko Iwamoto Satoshi |
| author_sort | Ishida Natsuko |
| collection | DOAJ |
| description | Topological lasers have been intensively investigated as a strong candidate for robust single-mode lasers. A typical topological laser employs a single-mode topological edge state, which appears deterministically in a designed topological bandgap and exhibits robustness to disorder. These properties seem to be highly attractive in pursuit of high-power lasers capable of single mode operation. In this paper, we theoretically analyze a large-scale single-mode laser based on a topological edge state. We consider a sizable array laser consisting of a few hundreds of site resonators, which support a single topological edge mode broadly distributed among the resonators. We build a basic model describing the laser using the tight binding approximation and evaluate the stability of single mode lasing based on the threshold gain difference Δα between the first-lasing edge mode and the second-lasing competing bulk mode. Our calculations demonstrate that stronger couplings between the cavities and lower losses are advantageous for achieving stable operation of the device. When assuming an average coupling of 100 cm−1 between site resonators and other realistic parameters, the threshold gain difference Δα can reach about 2 cm−1, which would be sufficient for stable single mode lasing using a conventional semiconductor laser architecture. We also consider the effects of possible disorders and long-range interactions to assess the robustness of the laser under non-ideal situations. These results lay the groundwork for developing single-mode high-power topological lasers. |
| first_indexed | 2024-04-10T21:35:27Z |
| format | Article |
| id | doaj.art-ecd86fe3d74d4186b71dc02a21c5c003 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-04-10T21:35:27Z |
| publishDate | 2022-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-ecd86fe3d74d4186b71dc02a21c5c0032023-01-19T12:46:58ZengDe GruyterNanophotonics2192-86142022-02-011192169218110.1515/nanoph-2021-0608A large-scale single-mode array laser based on a topological edge modeIshida Natsuko0Ota Yasutomo1Lin Wenbo2Byrnes Tim3Arakawa Yasuhiko4Iwamoto Satoshi5Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, 153-8505, JapanDepartment of Applied Physics and Physico-Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa223-8522, JapanResearch Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, 153-8505, JapanNew York University Shanghai, 1555 Century Ave, Pudong, Shanghai, 200122, ChinaInstitute for Nano Quantum Information Electronics, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, 153-8505, JapanResearch Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, 153-8505, JapanTopological lasers have been intensively investigated as a strong candidate for robust single-mode lasers. A typical topological laser employs a single-mode topological edge state, which appears deterministically in a designed topological bandgap and exhibits robustness to disorder. These properties seem to be highly attractive in pursuit of high-power lasers capable of single mode operation. In this paper, we theoretically analyze a large-scale single-mode laser based on a topological edge state. We consider a sizable array laser consisting of a few hundreds of site resonators, which support a single topological edge mode broadly distributed among the resonators. We build a basic model describing the laser using the tight binding approximation and evaluate the stability of single mode lasing based on the threshold gain difference Δα between the first-lasing edge mode and the second-lasing competing bulk mode. Our calculations demonstrate that stronger couplings between the cavities and lower losses are advantageous for achieving stable operation of the device. When assuming an average coupling of 100 cm−1 between site resonators and other realistic parameters, the threshold gain difference Δα can reach about 2 cm−1, which would be sufficient for stable single mode lasing using a conventional semiconductor laser architecture. We also consider the effects of possible disorders and long-range interactions to assess the robustness of the laser under non-ideal situations. These results lay the groundwork for developing single-mode high-power topological lasers.https://doi.org/10.1515/nanoph-2021-0608high power laserlasersphotonic crystalssemiconductor laserstopological laserstopological photonics |
| spellingShingle | Ishida Natsuko Ota Yasutomo Lin Wenbo Byrnes Tim Arakawa Yasuhiko Iwamoto Satoshi A large-scale single-mode array laser based on a topological edge mode Nanophotonics high power laser lasers photonic crystals semiconductor lasers topological lasers topological photonics |
| title | A large-scale single-mode array laser based on a topological edge mode |
| title_full | A large-scale single-mode array laser based on a topological edge mode |
| title_fullStr | A large-scale single-mode array laser based on a topological edge mode |
| title_full_unstemmed | A large-scale single-mode array laser based on a topological edge mode |
| title_short | A large-scale single-mode array laser based on a topological edge mode |
| title_sort | large scale single mode array laser based on a topological edge mode |
| topic | high power laser lasers photonic crystals semiconductor lasers topological lasers topological photonics |
| url | https://doi.org/10.1515/nanoph-2021-0608 |
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