Broadband Waveguide-Coupled Photodetectors in a Submicrometer-Wavelength Silicon Photonics Platform
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866912611897966592 |
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| author | Govdeli, Alperen Mikkelsen, Jared C. Bebeti, Engjell Chua, Hongyao Lo, Guo-Qiang Poon, Joyce K. S. Sacher, Wesley D. |
| author_facet | Govdeli, Alperen Mikkelsen, Jared C. Bebeti, Engjell Chua, Hongyao Lo, Guo-Qiang Poon, Joyce K. S. Sacher, Wesley D. |
| contents | Advances in silicon (Si) photonics at submicrometer wavelengths are unlocking new opportunities to realize miniaturized, scalable optical systems for biophotonics, quantum information, imaging, spectroscopy, and displays. Addressing this array of applications with a single integrated photonics technology requires the development of high-performance active components compatible with both visible and near-infrared light. Here, we report waveguide-coupled photodetectors monolithically integrated in a foundry-fabricated, short-wavelength, Si photonics platform. We demonstrate two detector variants that collectively cover a continuous wavelength span of $λ=$ 400 - 955 nm. The devices exhibited external quantum efficiencies exceeding 60% and 12% over 400 - 748 nm and 749 - 955 nm wavelength ranges, respectively. Measured dark currents were $<$ 2 pA at a 2 V reverse bias. High-speed measurements at $λ=$ 785 nm demonstrated optoelectronic bandwidths up to 18 GHz. Avalanche operation was characterized, yielding a gain-bandwidth product of 374 GHz. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_23353 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Broadband Waveguide-Coupled Photodetectors in a Submicrometer-Wavelength Silicon Photonics Platform Govdeli, Alperen Mikkelsen, Jared C. Bebeti, Engjell Chua, Hongyao Lo, Guo-Qiang Poon, Joyce K. S. Sacher, Wesley D. Optics Applied Physics Advances in silicon (Si) photonics at submicrometer wavelengths are unlocking new opportunities to realize miniaturized, scalable optical systems for biophotonics, quantum information, imaging, spectroscopy, and displays. Addressing this array of applications with a single integrated photonics technology requires the development of high-performance active components compatible with both visible and near-infrared light. Here, we report waveguide-coupled photodetectors monolithically integrated in a foundry-fabricated, short-wavelength, Si photonics platform. We demonstrate two detector variants that collectively cover a continuous wavelength span of $λ=$ 400 - 955 nm. The devices exhibited external quantum efficiencies exceeding 60% and 12% over 400 - 748 nm and 749 - 955 nm wavelength ranges, respectively. Measured dark currents were $<$ 2 pA at a 2 V reverse bias. High-speed measurements at $λ=$ 785 nm demonstrated optoelectronic bandwidths up to 18 GHz. Avalanche operation was characterized, yielding a gain-bandwidth product of 374 GHz. |
| title | Broadband Waveguide-Coupled Photodetectors in a Submicrometer-Wavelength Silicon Photonics Platform |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2509.23353 |