What question did this study set out to answer?

To analyze the photoresponse and carrier dynamics of uni-traveling-carrier photodiodes to determine the structural and transport factors enabling high-speed operation.

October 1, 1997Japanese Journal of Applied Physics

High-Speed Response of Uni-Traveling-Carrier Photodiodes

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Authors

TITadao IshibashiNTT (Japan)SKSatoshi KodamaThe University of Tokyo NSNobutaka ShimizuNippon Steel (Japan)

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Implication

Computational modeling demonstrates enhanced frequency response in uni-traveling-carrier photodiodes, highlighting the role of electron transport dynamics in boosting optical bandwidth.

Key Points

To analyze the photoresponse and carrier dynamics of uni-traveling-carrier photodiodes to determine the structural and transport factors enabling high-speed operation.
Applied small-signal analysis using a drift-diffusion model to simulate carrier dynamics within the neutral light absorption layer.
Incorporated electron thermionic emission velocity as an edge boundary condition to accurately model frequency response.
Calculated response characteristics for InP/InGaAsP photodiodes across matched absorption and depleted carrier-collection layer thicknesses.
High electron mobility in the absorption layer and high drift velocity from velocity overshoot in the collecting layer proved critical for minimizing response times.
Carrier transport within the absorption layer governed overall device response when substantial velocity overshoot occurred in the collection layer.
Incorporating a quasi-field in the absorption layer broadened device bandwidth several-fold over conventional pin photodiodes while maintaining comparable internal quantum efficiency.

Cite This Study

Ishibashi et al. (1997) studied this question.

synapsesocial.com/papers/69b2da3decccea4784e33413 https://doi.org/10.1143/jjap.36.6263

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Implication

Computational modeling demonstrates enhanced frequency response in uni-traveling-carrier photodiodes, highlighting the role of electron transport dynamics in boosting optical bandwidth.

High-Speed Response of Uni-Traveling-Carrier Photodiodes

Discussion

Member takes

Implication

Key Points

Cite This Study

High-Speed Response of Uni-Traveling-Carrier Photodiodes

Discussion

Member takes

Implication

Key Points

Cite This Study

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