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Design of uni-traveling-carrier photodiode With Nanoscale Optical Microstructures

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posted on 2023-09-22, 09:57 authored by Kai Liu, Junjie Wang, Xiaowen Dong, Xiaofeng Duan, Yongqing Huang, Xiaomin Ren
In this article, we report a uni-traveling-carrier photodiode (UTC-PD) incorporating nanoscale optical microstructures. We design a waveguide-based UTC-PD containing an internal optical scattering structure to convert incident light from vertical incidence to lateral propagation and to constrain the light within the absorption layer of the UTC-PD as much as possible. In this way, the proposed UTC-PD can have an operating performance like that of a waveguide-type PD under vertical light incidence, and its responsivity will increase. The ideal responsivity of the designed UTC-PD with an absorption layer thickness of 200nm after optimization can reach 0.43A/W, which is 48% higher than that of the traditional structure.

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Funder Name

National Natural Science Foundation of China (62374020,61874147,61904016)

Preprint ID

109286

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