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1 ,\times, 4 Ge-on-SOI PIN Photodetector Array for Parallel Optical Interconnects

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6 Author(s)
Chunlai Xue ; State Key Lab. on Integrated Optoelectron., Chinese Acad. of Sci., Beijing, China ; Haiyun Xue ; Buwen Cheng ; Weixuan Hu
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High-quality Ge film was epitaxially grown on silicon on insulator using the ultrahigh vacuum chemical vapor deposition. In this paper, we demonstrated that the efficient 1 ?? 4 germanium-on-silicon p-i-n photodetector arrays with 1.0 ??m Ge film had a responsivity as high as 0.65 A/W at 1.31 ??m and 0.32 A/W at 1.55 ??m, respectively. The dark current density was about 0.75 mA/cm2 at 0 V and 13.9 mA/cm2 at 1.0 V reverse bias. The detectors with a diameter of 25 ??m were measured at 1550 nm incident light under 0 V bias, and the result showed that the 3-dB bandwidth is 2.48 GHz. At a reverse bias of 3 V, the bandwidth is about 13.3 GHz. The four devices showed a good consistency.

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Lightwave Technology, Journal of  (Volume:27 ,  Issue: 24 )