Optimization of multi-stage avalanche photodiode structure based on InGaAs/InAlAs

Meiqin Du; Lihong Han; Xiaoning Guan; Tong Sun; Gang Liu; Feng Zhou; Pengfei Lu

doi:10.1117/12.3014247

30 April 2024 Optimization of multi-stage avalanche photodiode structure based on InGaAs/InAlAs

Meiqin Du, Lihong Han, Xiaoning Guan, Tong Sun, Gang Liu, Feng Zhou, Pengfei Lu

Proceedings Volume 13154, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Detector Technologies; 1315406 (2024) https://doi.org/10.1117/12.3014247
Event: Sixth Conference on Frontiers in Optical Imaging Technology and Applications (FOI2023), 2023, Nanjing, JS, China

Abstract

Avalanche photodiodes (APD) can amplify the photoelectric signal based on the avalanche multiplication effect of carrier to improve the sensitivity of detection. They have the characteristics of low noise and high gain, so they are suitable for long-distance optical communication. In this work, a multi-stage avalanche photodiode structure with SAGCM (Separated Absorption, Grading, Charge and Multiplication region) is proposed based on Impact Ionization Engineering (I²E). The photocurrent, dark current, electric field, gain and noise characteristics of InGaAs/InAlAs avalanche photodiodes are studied by optimizing the grading layer's thickness and doping concentration. According to the final simulation results, the optimized avalanche photodiodes has low excess noise. At 60 V voltage and 300 K temperature, the noise factor k value (the ratio of impact ionization coefficients) of the five-stage APD is 0.012, and the gain can reach 430.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Meiqin Du, Lihong Han, Xiaoning Guan, Tong Sun, Gang Liu, Feng Zhou, and Pengfei Lu "Optimization of multi-stage avalanche photodiode structure based on InGaAs/InAlAs", Proc. SPIE 13154, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Detector Technologies, 1315406 (30 April 2024); https://doi.org/10.1117/12.3014247

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