What question did this study set out to answer?

To investigate the effects of proton irradiation on Ge/Si integrated photodetectors and evaluate hydrogen loading as a hardening method.

June 15, 2026NanophotonicsOpen Access

Proton‐Radiation Hardening of High‐Speed Ge/Si Integrated Photodetectors for Space Applications

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Authors

JXJunguo XuShenzhen University YZYingying ZhongShanghai Institute of Optics and Fine Mechanics XBXiongping BaoShanghai Institute of Optics and Fine Mechanics

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Implication

Randomized trial validates hydrogen loading to enhance the performance of Ge/Si photodetectors under proton irradiation, suggesting improved reliability for space applications.

Key Points

To investigate the effects of proton irradiation on Ge/Si integrated photodetectors and evaluate hydrogen loading as a hardening method.
Conducted a broad-spectrum proton-irradiation study on high-speed Ge/Si integrated photodetectors.
Utilized RCF-calibrated energy–fluence spectrum and Geant4 simulations for dose-calibrated testing.
Tested devices at cumulative deposited doses of 158, 316, and 790 under a laser–plasma-driven proton beam.
For untreated devices, bandwidth decreased significantly and dark current increased, indicating compromised performance.
Hydrogen-loaded devices maintained bandwidth comparable to preirradiation levels while dark current increase was limited.
Demonstrated effective radiation hardening for space applications with hydrogen loading.

Cite This Study

Xu et al. (2026) studied this question.

synapsesocial.com/papers/6a2f9718a1cfeec4908282ee https://doi.org/10.1002/nap2.70165

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Implication

Randomized trial validates hydrogen loading to enhance the performance of Ge/Si photodetectors under proton irradiation, suggesting improved reliability for space applications.

Proton‐Radiation Hardening of High‐Speed Ge/Si Integrated Photodetectors for Space Applications

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Implication

Key Points

Cite This Study

Proton‐Radiation Hardening of High‐Speed Ge/Si Integrated Photodetectors for Space Applications

Discussion

Member takes

Implication

Key Points

Cite This Study

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