Strong Coupling‐Induced Topological Edge‐State Laser in 1D High‐Contrast Grating
In this study, the lattice constant and filling factor of the 1D high‐contrast grating (HCG) to induce strong coupling and weak coupling between transverse guided modes, to create mode parity transitions, are manipulated. In the strong coupling regime, the band inversion happens at the Γ point and c...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-07-01
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| Series: | Advanced Photonics Research |
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| Online Access: | https://doi.org/10.1002/adpr.202500049 |
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| author | Hsu‐Chun Hu Chia‐Jui Chang Jhih‐Sheng Wu Tien‐Chang Lu |
| author_facet | Hsu‐Chun Hu Chia‐Jui Chang Jhih‐Sheng Wu Tien‐Chang Lu |
| author_sort | Hsu‐Chun Hu |
| collection | DOAJ |
| description | In this study, the lattice constant and filling factor of the 1D high‐contrast grating (HCG) to induce strong coupling and weak coupling between transverse guided modes, to create mode parity transitions, are manipulated. In the strong coupling regime, the band inversion happens at the Γ point and changes the topology of the band structure. Hence, this hidden symmetric parameter transforms the HCG structures in the strong coupling and weak coupling regimes to the topological and trivial states, respectively. In the experiment, topological edge‐state lasers by combining topological and trivial lattices are demonstrated. According to bulk‐edge correspondence, a highly localized state unambiguously appears at the structure boundary, which can be utilized as a laser cavity. The laser emission is successfully demonstrated at room temperature in the 1D semiconductor HCG with multiple quantum wells. Compared with the traditional 1D band edge laser, the novel design has a lower threshold and narrower laser linewidth. Compared with the traditional 1D topological edge‐state laser, the innovative design exhibits better robustness against defects. The results pave the way for further novel topological laser cavity designs. |
| format | Article |
| id | doaj-art-d65ce445bdab4f958f11f5585b13a961 |
| institution | Matheson Library |
| issn | 2699-9293 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Photonics Research |
| spelling | doaj-art-d65ce445bdab4f958f11f5585b13a9612025-07-07T09:26:31ZengWiley-VCHAdvanced Photonics Research2699-92932025-07-0167n/an/a10.1002/adpr.202500049Strong Coupling‐Induced Topological Edge‐State Laser in 1D High‐Contrast GratingHsu‐Chun Hu0Chia‐Jui Chang1Jhih‐Sheng Wu2Tien‐Chang Lu3Department of Photonics College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu 30010 TaiwanDepartment of Photonics College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu 30010 TaiwanDepartment of Photonics College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu 30010 TaiwanDepartment of Photonics College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu 30010 TaiwanIn this study, the lattice constant and filling factor of the 1D high‐contrast grating (HCG) to induce strong coupling and weak coupling between transverse guided modes, to create mode parity transitions, are manipulated. In the strong coupling regime, the band inversion happens at the Γ point and changes the topology of the band structure. Hence, this hidden symmetric parameter transforms the HCG structures in the strong coupling and weak coupling regimes to the topological and trivial states, respectively. In the experiment, topological edge‐state lasers by combining topological and trivial lattices are demonstrated. According to bulk‐edge correspondence, a highly localized state unambiguously appears at the structure boundary, which can be utilized as a laser cavity. The laser emission is successfully demonstrated at room temperature in the 1D semiconductor HCG with multiple quantum wells. Compared with the traditional 1D band edge laser, the novel design has a lower threshold and narrower laser linewidth. Compared with the traditional 1D topological edge‐state laser, the innovative design exhibits better robustness against defects. The results pave the way for further novel topological laser cavity designs.https://doi.org/10.1002/adpr.202500049band edge lasershigh‐contrast gratingstrong couplingtopological edge‐state laserstopological photonics |
| spellingShingle | Hsu‐Chun Hu Chia‐Jui Chang Jhih‐Sheng Wu Tien‐Chang Lu Strong Coupling‐Induced Topological Edge‐State Laser in 1D High‐Contrast Grating Advanced Photonics Research band edge lasers high‐contrast grating strong coupling topological edge‐state lasers topological photonics |
| title | Strong Coupling‐Induced Topological Edge‐State Laser in 1D High‐Contrast Grating |
| title_full | Strong Coupling‐Induced Topological Edge‐State Laser in 1D High‐Contrast Grating |
| title_fullStr | Strong Coupling‐Induced Topological Edge‐State Laser in 1D High‐Contrast Grating |
| title_full_unstemmed | Strong Coupling‐Induced Topological Edge‐State Laser in 1D High‐Contrast Grating |
| title_short | Strong Coupling‐Induced Topological Edge‐State Laser in 1D High‐Contrast Grating |
| title_sort | strong coupling induced topological edge state laser in 1d high contrast grating |
| topic | band edge lasers high‐contrast grating strong coupling topological edge‐state lasers topological photonics |
| url | https://doi.org/10.1002/adpr.202500049 |
| work_keys_str_mv | AT hsuchunhu strongcouplinginducedtopologicaledgestatelaserin1dhighcontrastgrating AT chiajuichang strongcouplinginducedtopologicaledgestatelaserin1dhighcontrastgrating AT jhihshengwu strongcouplinginducedtopologicaledgestatelaserin1dhighcontrastgrating AT tienchanglu strongcouplinginducedtopologicaledgestatelaserin1dhighcontrastgrating |