Two-dimensional heterostructure quasi-BIC photonic crystal surface-emitting laser with low divergence
High beam quality, large-area output, and small footprint are significant pursuing goals for vertical-cavity surface-emitting lasers (VCSELs), which impose strict requirements on tight light confinements with minimized radiation losses. To achieve this, bound states in the continuum (BICs) have been...
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-06-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2023-0156 |
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| author | Tang Renjie Shi Yilin Shang Hongpeng Wu Jianghong Ma Hui Wei Maoliang Luo Ye Chen Zequn Ye Yuting Jian Jialing Zheng Xiaorui Lin Hongtao Li Lan |
| author_facet | Tang Renjie Shi Yilin Shang Hongpeng Wu Jianghong Ma Hui Wei Maoliang Luo Ye Chen Zequn Ye Yuting Jian Jialing Zheng Xiaorui Lin Hongtao Li Lan |
| author_sort | Tang Renjie |
| collection | DOAJ |
| description | High beam quality, large-area output, and small footprint are significant pursuing goals for vertical-cavity surface-emitting lasers (VCSELs), which impose strict requirements on tight light confinements with minimized radiation losses. To achieve this, bound states in the continuum (BICs) have been demonstrated as an effective way of trapping light. Here, we combine BICs and photonic bandgaps to realize a quasi-BIC single-mode photonic crystal (PhC) laser on a colloidal quantum dots (CQDs)/silicon oxide (SiO2) hybrid integrated platform. The PhC cavity is a defect-free hexagonal heterostructure with three regions, and the thin CQDs film is embedded within the SiO2 nanopillar planar array as both an optical gain material and a backbone for the PhC. The mode gaps between different regions provide the lateral confinement while the quasi-BICs near the Γ-point generate the small-divergence vertical radiation coupling, resulting in a well-defined emission concentrating within ±1.85° of the normal surface direction and an optical pumping energy density threshold of 216.75 μJ/cm2. Our results demonstrate the design flexibility and versatility of the quasi-BIC laser even with a low contrast of a refractive index between the PhC slab and the substrate, which has potential applications in cavity quantum electrodynamics, nonlinear optics, and integrated photonics. |
| format | Article |
| id | doaj-art-b7ca19eb8ed749e4a80ea2ec5a34d6da |
| institution | OA Journals |
| issn | 2192-8614 |
| language | English |
| publishDate | 2023-06-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-b7ca19eb8ed749e4a80ea2ec5a34d6da2025-08-20T02:23:35ZengDe GruyterNanophotonics2192-86142023-06-0112163257326510.1515/nanoph-2023-0156Two-dimensional heterostructure quasi-BIC photonic crystal surface-emitting laser with low divergenceTang Renjie0Shi Yilin1Shang Hongpeng2Wu Jianghong3Ma Hui4Wei Maoliang5Luo Ye6Chen Zequn7Ye Yuting8Jian Jialing9Zheng Xiaorui10Lin Hongtao11Li Lan12State Key Laboratory of Modern Optical Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou310027, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaState Key Laboratory of Modern Optical Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou310027, ChinaState Key Laboratory of Modern Optical Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou310027, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaState Key Laboratory of Modern Optical Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou310027, ChinaKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou310030, ChinaHigh beam quality, large-area output, and small footprint are significant pursuing goals for vertical-cavity surface-emitting lasers (VCSELs), which impose strict requirements on tight light confinements with minimized radiation losses. To achieve this, bound states in the continuum (BICs) have been demonstrated as an effective way of trapping light. Here, we combine BICs and photonic bandgaps to realize a quasi-BIC single-mode photonic crystal (PhC) laser on a colloidal quantum dots (CQDs)/silicon oxide (SiO2) hybrid integrated platform. The PhC cavity is a defect-free hexagonal heterostructure with three regions, and the thin CQDs film is embedded within the SiO2 nanopillar planar array as both an optical gain material and a backbone for the PhC. The mode gaps between different regions provide the lateral confinement while the quasi-BICs near the Γ-point generate the small-divergence vertical radiation coupling, resulting in a well-defined emission concentrating within ±1.85° of the normal surface direction and an optical pumping energy density threshold of 216.75 μJ/cm2. Our results demonstrate the design flexibility and versatility of the quasi-BIC laser even with a low contrast of a refractive index between the PhC slab and the substrate, which has potential applications in cavity quantum electrodynamics, nonlinear optics, and integrated photonics.https://doi.org/10.1515/nanoph-2023-0156colloidal quantum dotslow divergencephotonic crystalsquasi-bic laser |
| spellingShingle | Tang Renjie Shi Yilin Shang Hongpeng Wu Jianghong Ma Hui Wei Maoliang Luo Ye Chen Zequn Ye Yuting Jian Jialing Zheng Xiaorui Lin Hongtao Li Lan Two-dimensional heterostructure quasi-BIC photonic crystal surface-emitting laser with low divergence Nanophotonics colloidal quantum dots low divergence photonic crystals quasi-bic laser |
| title | Two-dimensional heterostructure quasi-BIC photonic crystal surface-emitting laser with low divergence |
| title_full | Two-dimensional heterostructure quasi-BIC photonic crystal surface-emitting laser with low divergence |
| title_fullStr | Two-dimensional heterostructure quasi-BIC photonic crystal surface-emitting laser with low divergence |
| title_full_unstemmed | Two-dimensional heterostructure quasi-BIC photonic crystal surface-emitting laser with low divergence |
| title_short | Two-dimensional heterostructure quasi-BIC photonic crystal surface-emitting laser with low divergence |
| title_sort | two dimensional heterostructure quasi bic photonic crystal surface emitting laser with low divergence |
| topic | colloidal quantum dots low divergence photonic crystals quasi-bic laser |
| url | https://doi.org/10.1515/nanoph-2023-0156 |
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