摘要
We have designed and fabricated zero-bias operational two-element symmetric-connected photodetector arrays(SC-PDAs).The designed SC-PDAs have higher saturation currents,larger RF power,and better frequency responses than the single photodetector(PD)under zero bias.The bias-free SC-PDA with 15μm diameter of each PD demonstrated a 3 d B bandwidth of 19.4 GHz at 0.5 m A.The RF saturation photocurrent and maximum RF output power of the SC-PDA with 40μm,50μm,and 60μm diameters under zero bias are over9.31 m A and-5.86 d Bm at 3 GHz,14.52 m A and 1.17 d Bm at 1 GHz,and 13.72 m A and-1.76 d Bm at 1 GHz,respectively.
基金
This work was supported by the National Natural Science Foundation of China(NSFC)(Nos.61574019,61674018,61674020,and 61874147)
the Fund of State Key Laboratory of Information Photonics and Optical Communications,and the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20130005130001).
