High-speed and high-power uni-traveling-carrier photodetector | Zendy

Lingzi Zhang | Zendy; Zuo Yu-Hua | Zendy; Quan Cao | Zendy; Xue Chun-Lai | Zendy; Buwen Cheng | Zendy; Zhang Wan-chang | Zendy; Cao Xue-Lei | Zendy; Qiming Wang | Zendy

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High-speed and high-power uni-traveling-carrier photodetector

Author(s) -

Lingzi Zhang,

Zuo Yu-Hua,

Quan Cao,

Xue Chun-Lai,

Buwen Cheng,

Zhang Wan-chang,

Cao Xue-Lei,

Qiming Wang

Publication year - 2012

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.61.138501

Subject(s) - photodetector , saturation (graph theory) , optoelectronics , materials science , electric field , bandwidth (computing) , optics , physics , computer science , telecommunications , mathematics , combinatorics , quantum mechanics

The drift-diffusion theory is adopted to simulate the bandwidth and the saturation characteristics of InGaAs/InP uni-traveling-carrier (UTC) photodetector. According to the experiment results, we analyze the physical mechanisms in high speed and high power UTC photodetector. It is shown that introducing the cliff layer and the gradually doped absorption layer can enhance the saturation characteristic obviously. Electric field collapse in the absorption layer leads to the saturation, and RC constant is still a limitation factor for device with diameter larger than 20 μm. In this paper we point out the effective methods to improve device performance.

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