CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Ultra Low Dark Current, High Responsivity and Thin Multiplication Region in InGaAs/InP Avalanche Photodiodes |
LI Bin, YANG Huai-Wei, GUI Qiang, YANG Xiao-Hong, WANG Jie, WANG Xiu-Ping, LIU Shao-Qing, HAN Qin** |
State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083
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Cite this article: |
LI Bin, YANG Huai-Wei, GUI Qiang et al 2012 Chin. Phys. Lett. 29 118503 |
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Abstract A separate absorption, grading, charge and multiplication InGaAs/InP avalanche photodiode with ultra low dark current and high responsivity is demonstrated. It has a thin multiplication layer and a planar structure. Through the use of a well and a single floating guard ring to suppress edge breakdown, the device can easily be fabricated by one step epitaxial growth and one step diffusion. The dark current of a 30 μm diameter device is as low as 0.028 nA at punch-through and 0.1 nA at 90% of the breakdown voltage. The responsivity at 1.55 μm is 0.93 A/W at unity gain and the multiplication layer is estimated to be less than 300 nm.
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Received: 28 June 2012
Published: 28 November 2012
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PACS: |
85.60.Gz
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(Photodetectors (including infrared and CCD detectors))
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73.40.Kp
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(III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
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81.15.Hi
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(Molecular, atomic, ion, and chemical beam epitaxy)
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