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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2510.05477 |
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| _version_ | 1866916993315110912 |
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| author | Takiguchi, Masato Fujii, Takuro Sumikura, Hisashi Shinya, Akihiko Matsuo, Shinji Notomi, Masaya |
| author_facet | Takiguchi, Masato Fujii, Takuro Sumikura, Hisashi Shinya, Akihiko Matsuo, Shinji Notomi, Masaya |
| contents | We report the demonstration of continuous-wave (CW) lasing at room temperature from a III-V semiconductor nanowire integrated into a Si photonic crystal (PhC) cavity. Conventional hybrid nanowire lasers [M. Takiguchi. et.al., APL Photonics, 2, 046106 (2017)], which typically feature circular nanowire-cross-sections, suffer from a weak optical confinement, preventing CW lasing under ambient conditions. To overcome this limitation, we fabricated nanowires with rectangular cross-sections via dry etching and integrated them into the air trenches of Si PhC cavities formed using atomic force microscope tips. This configuration forms a hybrid photonic crystal cavity with an improved optical confinement. As a result, we achieved room-temperature CW oscillation from a single nanowire, representing a significant step toward on-chip nanophotonic light sources. This unique in-plane integration of the nanolaser in the same plane as the Si slab rather than on top of the substrate will contribute to the development of compact, scalable, and CMOS-compatible photonic circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_05477 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On-chip room-temperature CW lasing from a III-V nanowire integrated with a Si photonic crystal platform Takiguchi, Masato Fujii, Takuro Sumikura, Hisashi Shinya, Akihiko Matsuo, Shinji Notomi, Masaya Optics We report the demonstration of continuous-wave (CW) lasing at room temperature from a III-V semiconductor nanowire integrated into a Si photonic crystal (PhC) cavity. Conventional hybrid nanowire lasers [M. Takiguchi. et.al., APL Photonics, 2, 046106 (2017)], which typically feature circular nanowire-cross-sections, suffer from a weak optical confinement, preventing CW lasing under ambient conditions. To overcome this limitation, we fabricated nanowires with rectangular cross-sections via dry etching and integrated them into the air trenches of Si PhC cavities formed using atomic force microscope tips. This configuration forms a hybrid photonic crystal cavity with an improved optical confinement. As a result, we achieved room-temperature CW oscillation from a single nanowire, representing a significant step toward on-chip nanophotonic light sources. This unique in-plane integration of the nanolaser in the same plane as the Si slab rather than on top of the substrate will contribute to the development of compact, scalable, and CMOS-compatible photonic circuits. |
| title | On-chip room-temperature CW lasing from a III-V nanowire integrated with a Si photonic crystal platform |
| topic | Optics |
| url | https://arxiv.org/abs/2510.05477 |